Timing properties for child nodes. All are optional and default to 0.
- - gpmc,sync-clk: Minimum clock period for synchronous mode, in picoseconds
-
- Chip-select signal timings corresponding to GPMC_CONFIG2:
- - gpmc,cs-on: Assertion time
- - gpmc,cs-rd-off: Read deassertion time
- - gpmc,cs-wr-off: Write deassertion time
-
- ADV signal timings corresponding to GPMC_CONFIG3:
- - gpmc,adv-on: Assertion time
- - gpmc,adv-rd-off: Read deassertion time
- - gpmc,adv-wr-off: Write deassertion time
-
- WE signals timings corresponding to GPMC_CONFIG4:
- - gpmc,we-on: Assertion time
- - gpmc,we-off: Deassertion time
-
- OE signals timings corresponding to GPMC_CONFIG4:
- - gpmc,oe-on: Assertion time
- - gpmc,oe-off: Deassertion time
-
- Access time and cycle time timings corresponding to GPMC_CONFIG5:
- - gpmc,page-burst-access: Multiple access word delay
- - gpmc,access: Start-cycle to first data valid delay
- - gpmc,rd-cycle: Total read cycle time
- - gpmc,wr-cycle: Total write cycle time
+ - gpmc,sync-clk-ps: Minimum clock period for synchronous mode, in picoseconds
+
+ Chip-select signal timings (in nanoseconds) corresponding to GPMC_CONFIG2:
+ - gpmc,cs-on-ns: Assertion time
+ - gpmc,cs-rd-off-ns: Read deassertion time
+ - gpmc,cs-wr-off-ns: Write deassertion time
+
+ ADV signal timings (in nanoseconds) corresponding to GPMC_CONFIG3:
+ - gpmc,adv-on-ns: Assertion time
+ - gpmc,adv-rd-off-ns: Read deassertion time
+ - gpmc,adv-wr-off-ns: Write deassertion time
+
+ WE signals timings (in nanoseconds) corresponding to GPMC_CONFIG4:
+ - gpmc,we-on-ns Assertion time
+ - gpmc,we-off-ns: Deassertion time
+
+ OE signals timings (in nanoseconds) corresponding to GPMC_CONFIG4:
+ - gpmc,oe-on-ns: Assertion time
+ - gpmc,oe-off-ns: Deassertion time
+
+ Access time and cycle time timings (in nanoseconds) corresponding to
+ GPMC_CONFIG5:
+ - gpmc,page-burst-access-ns: Multiple access word delay
+ - gpmc,access-ns: Start-cycle to first data valid delay
+ - gpmc,rd-cycle-ns: Total read cycle time
+ - gpmc,wr-cycle-ns: Total write cycle time
+ - gpmc,bus-turnaround-ns: Turn-around time between successive accesses
+ - gpmc,cycle2cycle-delay-ns: Delay between chip-select pulses
+ - gpmc,clk-activation-ns: GPMC clock activation time
+ - gpmc,wait-monitoring-ns: Start of wait monitoring with regard to valid
+ data
+
+Boolean timing parameters. If property is present parameter enabled and
+disabled if omitted:
+ - gpmc,adv-extra-delay: ADV signal is delayed by half GPMC clock
+ - gpmc,cs-extra-delay: CS signal is delayed by half GPMC clock
+ - gpmc,cycle2cycle-diffcsen: Add "cycle2cycle-delay" between successive
+ accesses to a different CS
+ - gpmc,cycle2cycle-samecsen: Add "cycle2cycle-delay" between successive
+ accesses to the same CS
+ - gpmc,oe-extra-delay: OE signal is delayed by half GPMC clock
+ - gpmc,we-extra-delay: WE signal is delayed by half GPMC clock
+ - gpmc,time-para-granularity: Multiply all access times by 2
The following are only applicable to OMAP3+ and AM335x:
- - gpmc,wr-access
- - gpmc,wr-data-mux-bus
-
+ - gpmc,wr-access-ns: In synchronous write mode, for single or
+ burst accesses, defines the number of
+ GPMC_FCLK cycles from start access time
+ to the GPMC_CLK rising edge used by the
+ memory device for the first data capture.
+ - gpmc,wr-data-mux-bus-ns: In address-data multiplex mode, specifies
+ the time when the first data is driven on
+ the address-data bus.
+
+GPMC chip-select settings properties for child nodes. All are optional.
+
+- gpmc,burst-length Page/burst length. Must be 4, 8 or 16.
+- gpmc,burst-wrap Enables wrap bursting
+- gpmc,burst-read Enables read page/burst mode
+- gpmc,burst-write Enables write page/burst mode
+- gpmc,device-nand Device is NAND
+- gpmc,device-width Total width of device(s) connected to a GPMC
+ chip-select in bytes. The GPMC supports 8-bit
+ and 16-bit devices and so this property must be
+ 1 or 2.
+- gpmc,mux-add-data Address and data multiplexing configuration.
+ Valid values are 1 for address-address-data
+ multiplexing mode and 2 for address-data
+ multiplexing mode.
+- gpmc,sync-read Enables synchronous read. Defaults to asynchronous
+ is this is not set.
+- gpmc,sync-write Enables synchronous writes. Defaults to asynchronous
+ is this is not set.
+- gpmc,wait-pin Wait-pin used by client. Must be less than
+ "gpmc,num-waitpins".
+- gpmc,wait-on-read Enables wait monitoring on reads.
+- gpmc,wait-on-write Enables wait monitoring on writes.
Example for an AM33xx board:
--- /dev/null
+Device tree bindings for NOR flash connect to TI GPMC
+
+NOR flash connected to the TI GPMC (found on OMAP boards) are represented as
+child nodes of the GPMC controller with a name of "nor".
+
+All timing relevant properties as well as generic GPMC child properties are
+explained in a separate documents. Please refer to
+Documentation/devicetree/bindings/bus/ti-gpmc.txt
+
+Required properties:
+- bank-width: Width of NOR flash in bytes. GPMC supports 8-bit and
+ 16-bit devices and so must be either 1 or 2 bytes.
+- compatible: Documentation/devicetree/bindings/mtd/mtd-physmap.txt
+- gpmc,cs-on-ns: Chip-select assertion time
+- gpmc,cs-rd-off-ns: Chip-select de-assertion time for reads
+- gpmc,cs-wr-off-ns: Chip-select de-assertion time for writes
+- gpmc,oe-on-ns: Output-enable assertion time
+- gpmc,oe-off-ns: Output-enable de-assertion time
+- gpmc,we-on-ns Write-enable assertion time
+- gpmc,we-off-ns: Write-enable de-assertion time
+- gpmc,access-ns: Start cycle to first data capture (read access)
+- gpmc,rd-cycle-ns: Total read cycle time
+- gpmc,wr-cycle-ns: Total write cycle time
+- linux,mtd-name: Documentation/devicetree/bindings/mtd/mtd-physmap.txt
+- reg: Chip-select, base address (relative to chip-select)
+ and size of NOR flash. Note that base address will be
+ typically 0 as this is the start of the chip-select.
+
+Optional properties:
+- gpmc,XXX Additional GPMC timings and settings parameters. See
+ Documentation/devicetree/bindings/bus/ti-gpmc.txt
+
+Optional properties for partiton table parsing:
+- #address-cells: should be set to 1
+- #size-cells: should be set to 1
+
+Example:
+
+gpmc: gpmc@6e000000 {
+ compatible = "ti,omap3430-gpmc", "simple-bus";
+ ti,hwmods = "gpmc";
+ reg = <0x6e000000 0x1000>;
+ interrupts = <20>;
+ gpmc,num-cs = <8>;
+ gpmc,num-waitpins = <4>;
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ ranges = <0 0 0x10000000 0x08000000>;
+
+ nor@0,0 {
+ compatible = "cfi-flash";
+ linux,mtd-name= "intel,pf48f6000m0y1be";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0 0 0x08000000>;
+ bank-width = <2>;
+
+ gpmc,mux-add-data;
+ gpmc,cs-on-ns = <0>;
+ gpmc,cs-rd-off-ns = <186>;
+ gpmc,cs-wr-off-ns = <186>;
+ gpmc,adv-on-ns = <12>;
+ gpmc,adv-rd-off-ns = <48>;
+ gpmc,adv-wr-off-ns = <48>;
+ gpmc,oe-on-ns = <54>;
+ gpmc,oe-off-ns = <168>;
+ gpmc,we-on-ns = <54>;
+ gpmc,we-off-ns = <168>;
+ gpmc,rd-cycle-ns = <186>;
+ gpmc,wr-cycle-ns = <186>;
+ gpmc,access-ns = <114>;
+ gpmc,page-burst-access-ns = <6>;
+ gpmc,bus-turnaround-ns = <12>;
+ gpmc,cycle2cycle-delay-ns = <18>;
+ gpmc,wr-data-mux-bus-ns = <90>;
+ gpmc,wr-access-ns = <186>;
+ gpmc,cycle2cycle-samecsen;
+ gpmc,cycle2cycle-diffcsen;
+
+ partition@0 {
+ label = "bootloader-nor";
+ reg = <0 0x40000>;
+ };
+ partition@0x40000 {
+ label = "params-nor";
+ reg = <0x40000 0x40000>;
+ };
+ partition@0x80000 {
+ label = "kernel-nor";
+ reg = <0x80000 0x200000>;
+ };
+ partition@0x280000 {
+ label = "filesystem-nor";
+ reg = <0x240000 0x7d80000>;
+ };
+ };
+};
Required properties:
- reg: The CS line the peripheral is connected to
+ - gpmc,device-width Width of the ONENAND device connected to the GPMC
+ in bytes. Must be 1 or 2.
Optional properties:
onenand@0 {
reg = <0 0 0>; /* CS0, offset 0 */
+ gpmc,device-width = <2>;
#address-cells = <1>;
#size-cells = <1>;
--- /dev/null
+Device tree bindings for Ethernet chip connected to TI GPMC
+
+Besides being used to interface with external memory devices, the
+General-Purpose Memory Controller can be used to connect Pseudo-SRAM devices
+such as ethernet controllers to processors using the TI GPMC as a data bus.
+
+Ethernet controllers connected to TI GPMC are represented as child nodes of
+the GPMC controller with an "ethernet" name.
+
+All timing relevant properties as well as generic GPMC child properties are
+explained in a separate documents. Please refer to
+Documentation/devicetree/bindings/bus/ti-gpmc.txt
+
+For the properties relevant to the ethernet controller connected to the GPMC
+refer to the binding documentation of the device. For example, the documentation
+for the SMSC 911x is Documentation/devicetree/bindings/net/smsc911x.txt
+
+Child nodes need to specify the GPMC bus address width using the "bank-width"
+property but is possible that an ethernet controller also has a property to
+specify the I/O registers address width. Even when the GPMC has a maximum 16-bit
+address width, it supports devices with 32-bit word registers.
+For example with an SMSC LAN911x/912x controller connected to the TI GPMC on an
+OMAP2+ board, "bank-width = <2>;" and "reg-io-width = <4>;".
+
+Required properties:
+- bank-width: Address width of the device in bytes. GPMC supports 8-bit
+ and 16-bit devices and so must be either 1 or 2 bytes.
+- compatible: Compatible string property for the ethernet child device.
+- gpmc,cs-on: Chip-select assertion time
+- gpmc,cs-rd-off: Chip-select de-assertion time for reads
+- gpmc,cs-wr-off: Chip-select de-assertion time for writes
+- gpmc,oe-on: Output-enable assertion time
+- gpmc,oe-off Output-enable de-assertion time
+- gpmc,we-on: Write-enable assertion time
+- gpmc,we-off: Write-enable de-assertion time
+- gpmc,access: Start cycle to first data capture (read access)
+- gpmc,rd-cycle: Total read cycle time
+- gpmc,wr-cycle: Total write cycle time
+- reg: Chip-select, base address (relative to chip-select)
+ and size of the memory mapped for the device.
+ Note that base address will be typically 0 as this
+ is the start of the chip-select.
+
+Optional properties:
+- gpmc,XXX Additional GPMC timings and settings parameters. See
+ Documentation/devicetree/bindings/bus/ti-gpmc.txt
+
+Example:
+
+gpmc: gpmc@6e000000 {
+ compatible = "ti,omap3430-gpmc";
+ ti,hwmods = "gpmc";
+ reg = <0x6e000000 0x1000>;
+ interrupts = <20>;
+ gpmc,num-cs = <8>;
+ gpmc,num-waitpins = <4>;
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ ranges = <5 0 0x2c000000 0x1000000>;
+
+ ethernet@5,0 {
+ compatible = "smsc,lan9221", "smsc,lan9115";
+ reg = <5 0 0xff>;
+ bank-width = <2>;
+
+ gpmc,mux-add-data;
+ gpmc,cs-on = <0>;
+ gpmc,cs-rd-off = <186>;
+ gpmc,cs-wr-off = <186>;
+ gpmc,adv-on = <12>;
+ gpmc,adv-rd-off = <48>;
+ gpmc,adv-wr-off = <48>;
+ gpmc,oe-on = <54>;
+ gpmc,oe-off = <168>;
+ gpmc,we-on = <54>;
+ gpmc,we-off = <168>;
+ gpmc,rd-cycle = <186>;
+ gpmc,wr-cycle = <186>;
+ gpmc,access = <114>;
+ gpmc,page-burst-access = <6>;
+ gpmc,bus-turnaround = <12>;
+ gpmc,cycle2cycle-delay = <18>;
+ gpmc,wr-data-mux-bus = <90>;
+ gpmc,wr-access = <186>;
+ gpmc,cycle2cycle-samecsen;
+ gpmc,cycle2cycle-diffcsen;
+
+ interrupt-parent = <&gpio6>;
+ interrupts = <16>;
+ vmmc-supply = <&vddvario>;
+ vmmc_aux-supply = <&vdd33a>;
+ reg-io-width = <4>;
+
+ smsc,save-mac-address;
+ };
+};
t.cs_wr_off = gpmc_t->cs_wr_off;
t.wr_cycle = gpmc_t->wr_cycle;
- /* Configure GPMC */
- if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
- gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 1);
- else
- gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0);
- gpmc_cs_configure(gpmc_nand_data->cs,
- GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
- gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_WP, 0);
err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
if (err)
return err;
struct gpmc_timings *gpmc_t)
{
int err = 0;
+ struct gpmc_settings s;
struct device *dev = &gpmc_nand_device.dev;
+ memset(&s, 0, sizeof(struct gpmc_settings));
+
gpmc_nand_device.dev.platform_data = gpmc_nand_data;
err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
(unsigned long *)&gpmc_nand_resource[0].start);
if (err < 0) {
- dev_err(dev, "Cannot request GPMC CS\n");
+ dev_err(dev, "Cannot request GPMC CS %d, error %d\n",
+ gpmc_nand_data->cs, err);
return err;
}
dev_err(dev, "Unable to set gpmc timings: %d\n", err);
return err;
}
- }
- /* Enable RD PIN Monitoring Reg */
- if (gpmc_nand_data->dev_ready) {
- gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1);
+ if (gpmc_nand_data->of_node) {
+ gpmc_read_settings_dt(gpmc_nand_data->of_node, &s);
+ } else {
+ s.device_nand = true;
+
+ /* Enable RD PIN Monitoring Reg */
+ if (gpmc_nand_data->dev_ready) {
+ s.wait_on_read = true;
+ s.wait_on_write = true;
+ }
+ }
+
+ if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
+ s.device_width = GPMC_DEVWIDTH_16BIT;
+ else
+ s.device_width = GPMC_DEVWIDTH_8BIT;
+
+ err = gpmc_cs_program_settings(gpmc_nand_data->cs, &s);
+ if (err < 0)
+ goto out_free_cs;
+
+ err = gpmc_configure(GPMC_CONFIG_WP, 0);
+ if (err < 0)
+ goto out_free_cs;
}
gpmc_update_nand_reg(&gpmc_nand_data->reg, gpmc_nand_data->cs);
.resource = &gpmc_onenand_resource,
};
-static struct gpmc_timings omap2_onenand_calc_async_timings(void)
+static struct gpmc_settings onenand_async = {
+ .device_width = GPMC_DEVWIDTH_16BIT,
+ .mux_add_data = GPMC_MUX_AD,
+};
+
+static struct gpmc_settings onenand_sync = {
+ .burst_read = true,
+ .burst_wrap = true,
+ .burst_len = GPMC_BURST_16,
+ .device_width = GPMC_DEVWIDTH_16BIT,
+ .mux_add_data = GPMC_MUX_AD,
+ .wait_pin = 0,
+};
+
+static void omap2_onenand_calc_async_timings(struct gpmc_timings *t)
{
struct gpmc_device_timings dev_t;
- struct gpmc_timings t;
-
const int t_cer = 15;
const int t_avdp = 12;
const int t_aavdh = 7;
memset(&dev_t, 0, sizeof(dev_t));
- dev_t.mux = true;
dev_t.t_avdp_r = max_t(int, t_avdp, t_cer) * 1000;
dev_t.t_avdp_w = dev_t.t_avdp_r;
dev_t.t_aavdh = t_aavdh * 1000;
dev_t.t_wpl = t_wpl * 1000;
dev_t.t_wph = t_wph * 1000;
- gpmc_calc_timings(&t, &dev_t);
-
- return t;
-}
-
-static int gpmc_set_async_mode(int cs, struct gpmc_timings *t)
-{
- /* Configure GPMC for asynchronous read */
- gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1,
- GPMC_CONFIG1_DEVICESIZE_16 |
- GPMC_CONFIG1_MUXADDDATA);
-
- return gpmc_cs_set_timings(cs, t);
+ gpmc_calc_timings(t, &onenand_async, &dev_t);
}
static void omap2_onenand_set_async_mode(void __iomem *onenand_base)
return freq;
}
-static struct gpmc_timings
-omap2_onenand_calc_sync_timings(struct omap_onenand_platform_data *cfg,
- int freq)
+static void omap2_onenand_calc_sync_timings(struct gpmc_timings *t,
+ unsigned int flags,
+ int freq)
{
struct gpmc_device_timings dev_t;
- struct gpmc_timings t;
const int t_cer = 15;
const int t_avdp = 12;
const int t_cez = 20; /* max of t_cez, t_oez */
int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo;
int div, gpmc_clk_ns;
- if (cfg->flags & ONENAND_SYNC_READ)
+ if (flags & ONENAND_SYNC_READ)
onenand_flags = ONENAND_FLAG_SYNCREAD;
- else if (cfg->flags & ONENAND_SYNC_READWRITE)
+ else if (flags & ONENAND_SYNC_READWRITE)
onenand_flags = ONENAND_FLAG_SYNCREAD | ONENAND_FLAG_SYNCWRITE;
switch (freq) {
/* Set synchronous read timings */
memset(&dev_t, 0, sizeof(dev_t));
- dev_t.mux = true;
- dev_t.sync_read = true;
+ if (onenand_flags & ONENAND_FLAG_SYNCREAD)
+ onenand_sync.sync_read = true;
if (onenand_flags & ONENAND_FLAG_SYNCWRITE) {
- dev_t.sync_write = true;
+ onenand_sync.sync_write = true;
+ onenand_sync.burst_write = true;
} else {
dev_t.t_avdp_w = max(t_avdp, t_cer) * 1000;
dev_t.t_wpl = t_wpl * 1000;
dev_t.cyc_aavdh_oe = 1;
dev_t.t_rdyo = t_rdyo * 1000 + min_gpmc_clk_period;
- gpmc_calc_timings(&t, &dev_t);
-
- return t;
-}
-
-static int gpmc_set_sync_mode(int cs, struct gpmc_timings *t)
-{
- unsigned sync_read = onenand_flags & ONENAND_FLAG_SYNCREAD;
- unsigned sync_write = onenand_flags & ONENAND_FLAG_SYNCWRITE;
-
- /* Configure GPMC for synchronous read */
- gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1,
- GPMC_CONFIG1_WRAPBURST_SUPP |
- GPMC_CONFIG1_READMULTIPLE_SUPP |
- (sync_read ? GPMC_CONFIG1_READTYPE_SYNC : 0) |
- (sync_write ? GPMC_CONFIG1_WRITEMULTIPLE_SUPP : 0) |
- (sync_write ? GPMC_CONFIG1_WRITETYPE_SYNC : 0) |
- GPMC_CONFIG1_PAGE_LEN(2) |
- (cpu_is_omap34xx() ? 0 :
- (GPMC_CONFIG1_WAIT_READ_MON |
- GPMC_CONFIG1_WAIT_PIN_SEL(0))) |
- GPMC_CONFIG1_DEVICESIZE_16 |
- GPMC_CONFIG1_DEVICETYPE_NOR |
- GPMC_CONFIG1_MUXADDDATA);
-
- return gpmc_cs_set_timings(cs, t);
+ gpmc_calc_timings(t, &onenand_sync, &dev_t);
}
static int omap2_onenand_setup_async(void __iomem *onenand_base)
struct gpmc_timings t;
int ret;
+ if (gpmc_onenand_data->of_node)
+ gpmc_read_settings_dt(gpmc_onenand_data->of_node,
+ &onenand_async);
+
omap2_onenand_set_async_mode(onenand_base);
- t = omap2_onenand_calc_async_timings();
+ omap2_onenand_calc_async_timings(&t);
+
+ ret = gpmc_cs_program_settings(gpmc_onenand_data->cs, &onenand_async);
+ if (ret < 0)
+ return ret;
- ret = gpmc_set_async_mode(gpmc_onenand_data->cs, &t);
+ ret = gpmc_cs_set_timings(gpmc_onenand_data->cs, &t);
if (ret < 0)
return ret;
set_onenand_cfg(onenand_base);
}
- t = omap2_onenand_calc_sync_timings(gpmc_onenand_data, freq);
+ if (gpmc_onenand_data->of_node) {
+ gpmc_read_settings_dt(gpmc_onenand_data->of_node,
+ &onenand_sync);
+ } else {
+ /*
+ * FIXME: Appears to be legacy code from initial ONENAND commit.
+ * Unclear what boards this is for and if this can be removed.
+ */
+ if (!cpu_is_omap34xx())
+ onenand_sync.wait_on_read = true;
+ }
- ret = gpmc_set_sync_mode(gpmc_onenand_data->cs, &t);
+ omap2_onenand_calc_sync_timings(&t, gpmc_onenand_data->flags, freq);
+
+ ret = gpmc_cs_program_settings(gpmc_onenand_data->cs, &onenand_sync);
+ if (ret < 0)
+ return ret;
+
+ ret = gpmc_cs_set_timings(gpmc_onenand_data->cs, &t);
if (ret < 0)
return ret;
void gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data)
{
int err;
+ struct device *dev = &gpmc_onenand_device.dev;
gpmc_onenand_data = _onenand_data;
gpmc_onenand_data->onenand_setup = gpmc_onenand_setup;
if (cpu_is_omap24xx() &&
(gpmc_onenand_data->flags & ONENAND_SYNC_READWRITE)) {
- printk(KERN_ERR "Onenand using only SYNC_READ on 24xx\n");
+ dev_warn(dev, "OneNAND using only SYNC_READ on 24xx\n");
gpmc_onenand_data->flags &= ~ONENAND_SYNC_READWRITE;
gpmc_onenand_data->flags |= ONENAND_SYNC_READ;
}
err = gpmc_cs_request(gpmc_onenand_data->cs, ONENAND_IO_SIZE,
(unsigned long *)&gpmc_onenand_resource.start);
if (err < 0) {
- pr_err("%s: Cannot request GPMC CS\n", __func__);
+ dev_err(dev, "Cannot request GPMC CS %d, error %d\n",
+ gpmc_onenand_data->cs, err);
return;
}
ONENAND_IO_SIZE - 1;
if (platform_device_register(&gpmc_onenand_device) < 0) {
- pr_err("%s: Unable to register OneNAND device\n", __func__);
+ dev_err(dev, "Unable to register OneNAND device\n");
gpmc_cs_free(gpmc_onenand_data->cs);
return;
}
.resource = gpmc_smc91x_resources,
};
+static struct gpmc_settings smc91x_settings = {
+ .device_width = GPMC_DEVWIDTH_16BIT,
+};
+
/*
* Set the gpmc timings for smc91c96. The timings are taken
* from the data sheet available at:
const int t7 = 5; /* Figure 12.4 write */
const int t8 = 5; /* Figure 12.4 write */
const int t20 = 185; /* Figure 12.2 read and 12.4 write */
- u32 l;
-
- l = GPMC_CONFIG1_DEVICESIZE_16;
- if (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)
- l |= GPMC_CONFIG1_MUXADDDATA;
- if (gpmc_cfg->flags & GPMC_READ_MON)
- l |= GPMC_CONFIG1_WAIT_READ_MON;
- if (gpmc_cfg->flags & GPMC_WRITE_MON)
- l |= GPMC_CONFIG1_WAIT_WRITE_MON;
- if (gpmc_cfg->wait_pin)
- l |= GPMC_CONFIG1_WAIT_PIN_SEL(gpmc_cfg->wait_pin);
- gpmc_cs_write_reg(gpmc_cfg->cs, GPMC_CS_CONFIG1, l);
/*
* FIXME: Calculate the address and data bus muxed timings.
dev_t.t_cez_w = t4_w * 1000;
dev_t.t_wr_cycle = (t20 - t3) * 1000;
- gpmc_calc_timings(&t, &dev_t);
+ gpmc_calc_timings(&t, &smc91x_settings, &dev_t);
return gpmc_cs_set_timings(gpmc_cfg->cs, &t);
}
gpmc_smc91x_resources[0].end = cs_mem_base + 0x30f;
gpmc_smc91x_resources[1].flags |= (gpmc_cfg->flags & IRQF_TRIGGER_MASK);
+ if (gpmc_cfg->flags & GPMC_MUX_ADD_DATA)
+ smc91x_settings.mux_add_data = GPMC_MUX_AD;
+ if (gpmc_cfg->flags & GPMC_READ_MON)
+ smc91x_settings.wait_on_read = true;
+ if (gpmc_cfg->flags & GPMC_WRITE_MON)
+ smc91x_settings.wait_on_write = true;
+ if (gpmc_cfg->wait_pin)
+ smc91x_settings.wait_pin = gpmc_cfg->wait_pin;
+ ret = gpmc_cs_program_settings(gpmc_cfg->cs, &smc91x_settings);
+ if (ret < 0)
+ goto free1;
+
if (gpmc_cfg->retime) {
ret = gpmc_cfg->retime();
if (ret != 0)
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/of_mtd.h>
#include <linux/of_device.h>
#include <linux/mtd/nand.h>
#define GPMC_CS_SIZE 0x30
#define GPMC_BCH_SIZE 0x10
-#define GPMC_MEM_START 0x00000000
#define GPMC_MEM_END 0x3FFFFFFF
-#define BOOT_ROM_SPACE 0x100000 /* 1MB */
#define GPMC_CHUNK_SHIFT 24 /* 16 MB */
#define GPMC_SECTION_SHIFT 28 /* 128 MB */
#define GPMC_HAS_WR_ACCESS 0x1
#define GPMC_HAS_WR_DATA_MUX_BUS 0x2
+#define GPMC_HAS_MUX_AAD 0x4
+
+#define GPMC_NR_WAITPINS 4
/* XXX: Only NAND irq has been considered,currently these are the only ones used
*/
static DEFINE_SPINLOCK(gpmc_mem_lock);
/* Define chip-selects as reserved by default until probe completes */
static unsigned int gpmc_cs_map = ((1 << GPMC_CS_NUM) - 1);
+static unsigned int gpmc_nr_waitpins;
static struct device *gpmc_dev;
static int gpmc_irq;
static resource_size_t phys_base, mem_size;
__raw_writel(val, reg_addr);
}
-u32 gpmc_cs_read_reg(int cs, int idx)
+static u32 gpmc_cs_read_reg(int cs, int idx)
{
void __iomem *reg_addr;
}
/* TODO: Add support for gpmc_fck to clock framework and use it */
-unsigned long gpmc_get_fclk_period(void)
+static unsigned long gpmc_get_fclk_period(void)
{
unsigned long rate = clk_get_rate(gpmc_l3_clk);
return rate;
}
-unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
+static unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
{
unsigned long tick_ps;
return (time_ns * 1000 + tick_ps - 1) / tick_ps;
}
-unsigned int gpmc_ps_to_ticks(unsigned int time_ps)
+static unsigned int gpmc_ps_to_ticks(unsigned int time_ps)
{
unsigned long tick_ps;
return ticks * gpmc_get_fclk_period() / 1000;
}
-unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns)
-{
- unsigned long ticks = gpmc_ns_to_ticks(time_ns);
-
- return ticks * gpmc_get_fclk_period() / 1000;
-}
-
static unsigned int gpmc_ticks_to_ps(unsigned int ticks)
{
return ticks * gpmc_get_fclk_period();
return 0;
}
-static void gpmc_cs_enable_mem(int cs, u32 base, u32 size)
+static int gpmc_cs_enable_mem(int cs, u32 base, u32 size)
{
u32 l;
u32 mask;
+ /*
+ * Ensure that base address is aligned on a
+ * boundary equal to or greater than size.
+ */
+ if (base & (size - 1))
+ return -EINVAL;
+
mask = (1 << GPMC_SECTION_SHIFT) - size;
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
l &= ~0x3f;
l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8;
l |= GPMC_CONFIG7_CSVALID;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
+
+ return 0;
}
static void gpmc_cs_disable_mem(int cs)
return l & GPMC_CONFIG7_CSVALID;
}
-int gpmc_cs_set_reserved(int cs, int reserved)
+static void gpmc_cs_set_reserved(int cs, int reserved)
{
- if (cs > GPMC_CS_NUM)
- return -ENODEV;
-
gpmc_cs_map &= ~(1 << cs);
gpmc_cs_map |= (reserved ? 1 : 0) << cs;
-
- return 0;
}
-int gpmc_cs_reserved(int cs)
+static bool gpmc_cs_reserved(int cs)
{
- if (cs > GPMC_CS_NUM)
- return -ENODEV;
-
return gpmc_cs_map & (1 << cs);
}
return r;
}
+/**
+ * gpmc_cs_remap - remaps a chip-select physical base address
+ * @cs: chip-select to remap
+ * @base: physical base address to re-map chip-select to
+ *
+ * Re-maps a chip-select to a new physical base address specified by
+ * "base". Returns 0 on success and appropriate negative error code
+ * on failure.
+ */
+static int gpmc_cs_remap(int cs, u32 base)
+{
+ int ret;
+ u32 old_base, size;
+
+ if (cs > GPMC_CS_NUM)
+ return -ENODEV;
+ gpmc_cs_get_memconf(cs, &old_base, &size);
+ if (base == old_base)
+ return 0;
+ gpmc_cs_disable_mem(cs);
+ ret = gpmc_cs_delete_mem(cs);
+ if (ret < 0)
+ return ret;
+ ret = gpmc_cs_insert_mem(cs, base, size);
+ if (ret < 0)
+ return ret;
+ ret = gpmc_cs_enable_mem(cs, base, size);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
{
struct resource *res = &gpmc_cs_mem[cs];
if (r < 0)
goto out;
- gpmc_cs_enable_mem(cs, res->start, resource_size(res));
+ r = gpmc_cs_enable_mem(cs, res->start, resource_size(res));
+ if (r < 0) {
+ release_resource(res);
+ goto out;
+ }
+
*base = res->start;
gpmc_cs_set_reserved(cs, 1);
out:
EXPORT_SYMBOL(gpmc_cs_free);
/**
- * gpmc_cs_configure - write request to configure gpmc
- * @cs: chip select number
+ * gpmc_configure - write request to configure gpmc
* @cmd: command type
* @wval: value to write
* @return status of the operation
*/
-int gpmc_cs_configure(int cs, int cmd, int wval)
+int gpmc_configure(int cmd, int wval)
{
- int err = 0;
- u32 regval = 0;
+ u32 regval;
switch (cmd) {
case GPMC_ENABLE_IRQ:
gpmc_write_reg(GPMC_CONFIG, regval);
break;
- case GPMC_CONFIG_RDY_BSY:
- regval = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
- if (wval)
- regval |= WR_RD_PIN_MONITORING;
- else
- regval &= ~WR_RD_PIN_MONITORING;
- gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
- break;
-
- case GPMC_CONFIG_DEV_SIZE:
- regval = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
-
- /* clear 2 target bits */
- regval &= ~GPMC_CONFIG1_DEVICESIZE(3);
-
- /* set the proper value */
- regval |= GPMC_CONFIG1_DEVICESIZE(wval);
-
- gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
- break;
-
- case GPMC_CONFIG_DEV_TYPE:
- regval = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
- regval |= GPMC_CONFIG1_DEVICETYPE(wval);
- if (wval == GPMC_DEVICETYPE_NOR)
- regval |= GPMC_CONFIG1_MUXADDDATA;
- gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, regval);
- break;
-
default:
- printk(KERN_ERR "gpmc_configure_cs: Not supported\n");
- err = -EINVAL;
+ pr_err("%s: command not supported\n", __func__);
+ return -EINVAL;
}
- return err;
+ return 0;
}
-EXPORT_SYMBOL(gpmc_cs_configure);
+EXPORT_SYMBOL(gpmc_configure);
void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
{
}
-static int gpmc_mem_init(void)
+static void gpmc_mem_init(void)
{
- int cs, rc;
- unsigned long boot_rom_space = 0;
+ int cs;
- /* never allocate the first page, to facilitate bug detection;
- * even if we didn't boot from ROM.
+ /*
+ * The first 1MB of GPMC address space is typically mapped to
+ * the internal ROM. Never allocate the first page, to
+ * facilitate bug detection; even if we didn't boot from ROM.
*/
- boot_rom_space = BOOT_ROM_SPACE;
- gpmc_mem_root.start = GPMC_MEM_START + boot_rom_space;
+ gpmc_mem_root.start = SZ_1M;
gpmc_mem_root.end = GPMC_MEM_END;
/* Reserve all regions that has been set up by bootloader */
if (!gpmc_cs_mem_enabled(cs))
continue;
gpmc_cs_get_memconf(cs, &base, &size);
- rc = gpmc_cs_insert_mem(cs, base, size);
- if (rc < 0) {
- while (--cs >= 0)
- if (gpmc_cs_mem_enabled(cs))
- gpmc_cs_delete_mem(cs);
- return rc;
+ if (gpmc_cs_insert_mem(cs, base, size)) {
+ pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n",
+ __func__, cs, base, base + size);
+ gpmc_cs_disable_mem(cs);
}
}
-
- return 0;
}
static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk)
/* XXX: can the cycles be avoided ? */
static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t)
+ struct gpmc_device_timings *dev_t,
+ bool mux)
{
- bool mux = dev_t->mux;
u32 temp;
/* adv_rd_off */
}
static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t)
+ struct gpmc_device_timings *dev_t,
+ bool mux)
{
- bool mux = dev_t->mux;
u32 temp;
/* adv_wr_off */
}
static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t)
+ struct gpmc_device_timings *dev_t,
+ bool mux)
{
- bool mux = dev_t->mux;
u32 temp;
/* adv_rd_off */
}
static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t)
+ struct gpmc_device_timings *dev_t,
+ bool mux)
{
- bool mux = dev_t->mux;
u32 temp;
/* adv_wr_off */
}
static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t)
+ struct gpmc_device_timings *dev_t,
+ bool sync)
{
u32 temp;
gpmc_t->cs_on + dev_t->t_ce_avd);
gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp);
- if (dev_t->sync_write || dev_t->sync_read)
+ if (sync)
gpmc_calc_sync_common_timings(gpmc_t, dev_t);
return 0;
}
int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t)
+ struct gpmc_settings *gpmc_s,
+ struct gpmc_device_timings *dev_t)
{
+ bool mux = false, sync = false;
+
+ if (gpmc_s) {
+ mux = gpmc_s->mux_add_data ? true : false;
+ sync = (gpmc_s->sync_read || gpmc_s->sync_write);
+ }
+
memset(gpmc_t, 0, sizeof(*gpmc_t));
- gpmc_calc_common_timings(gpmc_t, dev_t);
+ gpmc_calc_common_timings(gpmc_t, dev_t, sync);
- if (dev_t->sync_read)
- gpmc_calc_sync_read_timings(gpmc_t, dev_t);
+ if (gpmc_s && gpmc_s->sync_read)
+ gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux);
else
- gpmc_calc_async_read_timings(gpmc_t, dev_t);
+ gpmc_calc_async_read_timings(gpmc_t, dev_t, mux);
- if (dev_t->sync_write)
- gpmc_calc_sync_write_timings(gpmc_t, dev_t);
+ if (gpmc_s && gpmc_s->sync_write)
+ gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux);
else
- gpmc_calc_async_write_timings(gpmc_t, dev_t);
+ gpmc_calc_async_write_timings(gpmc_t, dev_t, mux);
/* TODO: remove, see function definition */
gpmc_convert_ps_to_ns(gpmc_t);
return 0;
}
+/**
+ * gpmc_cs_program_settings - programs non-timing related settings
+ * @cs: GPMC chip-select to program
+ * @p: pointer to GPMC settings structure
+ *
+ * Programs non-timing related settings for a GPMC chip-select, such as
+ * bus-width, burst configuration, etc. Function should be called once
+ * for each chip-select that is being used and must be called before
+ * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1
+ * register will be initialised to zero by this function. Returns 0 on
+ * success and appropriate negative error code on failure.
+ */
+int gpmc_cs_program_settings(int cs, struct gpmc_settings *p)
+{
+ u32 config1;
+
+ if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) {
+ pr_err("%s: invalid width %d!", __func__, p->device_width);
+ return -EINVAL;
+ }
+
+ /* Address-data multiplexing not supported for NAND devices */
+ if (p->device_nand && p->mux_add_data) {
+ pr_err("%s: invalid configuration!\n", __func__);
+ return -EINVAL;
+ }
+
+ if ((p->mux_add_data > GPMC_MUX_AD) ||
+ ((p->mux_add_data == GPMC_MUX_AAD) &&
+ !(gpmc_capability & GPMC_HAS_MUX_AAD))) {
+ pr_err("%s: invalid multiplex configuration!\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Page/burst mode supports lengths of 4, 8 and 16 bytes */
+ if (p->burst_read || p->burst_write) {
+ switch (p->burst_len) {
+ case GPMC_BURST_4:
+ case GPMC_BURST_8:
+ case GPMC_BURST_16:
+ break;
+ default:
+ pr_err("%s: invalid page/burst-length (%d)\n",
+ __func__, p->burst_len);
+ return -EINVAL;
+ }
+ }
+
+ if ((p->wait_on_read || p->wait_on_write) &&
+ (p->wait_pin > gpmc_nr_waitpins)) {
+ pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin);
+ return -EINVAL;
+ }
+
+ config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1));
+
+ if (p->sync_read)
+ config1 |= GPMC_CONFIG1_READTYPE_SYNC;
+ if (p->sync_write)
+ config1 |= GPMC_CONFIG1_WRITETYPE_SYNC;
+ if (p->wait_on_read)
+ config1 |= GPMC_CONFIG1_WAIT_READ_MON;
+ if (p->wait_on_write)
+ config1 |= GPMC_CONFIG1_WAIT_WRITE_MON;
+ if (p->wait_on_read || p->wait_on_write)
+ config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin);
+ if (p->device_nand)
+ config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND);
+ if (p->mux_add_data)
+ config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data);
+ if (p->burst_read)
+ config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP;
+ if (p->burst_write)
+ config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP;
+ if (p->burst_read || p->burst_write) {
+ config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3);
+ config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0;
+ }
+
+ gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1);
+
+ return 0;
+}
+
#ifdef CONFIG_OF
static struct of_device_id gpmc_dt_ids[] = {
{ .compatible = "ti,omap2420-gpmc" },
};
MODULE_DEVICE_TABLE(of, gpmc_dt_ids);
+/**
+ * gpmc_read_settings_dt - read gpmc settings from device-tree
+ * @np: pointer to device-tree node for a gpmc child device
+ * @p: pointer to gpmc settings structure
+ *
+ * Reads the GPMC settings for a GPMC child device from device-tree and
+ * stores them in the GPMC settings structure passed. The GPMC settings
+ * structure is initialised to zero by this function and so any
+ * previously stored settings will be cleared.
+ */
+void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p)
+{
+ memset(p, 0, sizeof(struct gpmc_settings));
+
+ p->sync_read = of_property_read_bool(np, "gpmc,sync-read");
+ p->sync_write = of_property_read_bool(np, "gpmc,sync-write");
+ p->device_nand = of_property_read_bool(np, "gpmc,device-nand");
+ of_property_read_u32(np, "gpmc,device-width", &p->device_width);
+ of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data);
+
+ if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) {
+ p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap");
+ p->burst_read = of_property_read_bool(np, "gpmc,burst-read");
+ p->burst_write = of_property_read_bool(np, "gpmc,burst-write");
+ if (!p->burst_read && !p->burst_write)
+ pr_warn("%s: page/burst-length set but not used!\n",
+ __func__);
+ }
+
+ if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) {
+ p->wait_on_read = of_property_read_bool(np,
+ "gpmc,wait-on-read");
+ p->wait_on_write = of_property_read_bool(np,
+ "gpmc,wait-on-write");
+ if (!p->wait_on_read && !p->wait_on_write)
+ pr_warn("%s: read/write wait monitoring not enabled!\n",
+ __func__);
+ }
+}
+
static void __maybe_unused gpmc_read_timings_dt(struct device_node *np,
struct gpmc_timings *gpmc_t)
{
- u32 val;
+ struct gpmc_bool_timings *p;
+
+ if (!np || !gpmc_t)
+ return;
memset(gpmc_t, 0, sizeof(*gpmc_t));
/* minimum clock period for syncronous mode */
- if (!of_property_read_u32(np, "gpmc,sync-clk", &val))
- gpmc_t->sync_clk = val;
+ of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk);
/* chip select timtings */
- if (!of_property_read_u32(np, "gpmc,cs-on", &val))
- gpmc_t->cs_on = val;
-
- if (!of_property_read_u32(np, "gpmc,cs-rd-off", &val))
- gpmc_t->cs_rd_off = val;
-
- if (!of_property_read_u32(np, "gpmc,cs-wr-off", &val))
- gpmc_t->cs_wr_off = val;
+ of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on);
+ of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off);
+ of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off);
/* ADV signal timings */
- if (!of_property_read_u32(np, "gpmc,adv-on", &val))
- gpmc_t->adv_on = val;
-
- if (!of_property_read_u32(np, "gpmc,adv-rd-off", &val))
- gpmc_t->adv_rd_off = val;
-
- if (!of_property_read_u32(np, "gpmc,adv-wr-off", &val))
- gpmc_t->adv_wr_off = val;
+ of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on);
+ of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off);
+ of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off);
/* WE signal timings */
- if (!of_property_read_u32(np, "gpmc,we-on", &val))
- gpmc_t->we_on = val;
-
- if (!of_property_read_u32(np, "gpmc,we-off", &val))
- gpmc_t->we_off = val;
+ of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on);
+ of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off);
/* OE signal timings */
- if (!of_property_read_u32(np, "gpmc,oe-on", &val))
- gpmc_t->oe_on = val;
-
- if (!of_property_read_u32(np, "gpmc,oe-off", &val))
- gpmc_t->oe_off = val;
+ of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on);
+ of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off);
/* access and cycle timings */
- if (!of_property_read_u32(np, "gpmc,page-burst-access", &val))
- gpmc_t->page_burst_access = val;
-
- if (!of_property_read_u32(np, "gpmc,access", &val))
- gpmc_t->access = val;
-
- if (!of_property_read_u32(np, "gpmc,rd-cycle", &val))
- gpmc_t->rd_cycle = val;
-
- if (!of_property_read_u32(np, "gpmc,wr-cycle", &val))
- gpmc_t->wr_cycle = val;
-
- /* only for OMAP3430 */
- if (!of_property_read_u32(np, "gpmc,wr-access", &val))
- gpmc_t->wr_access = val;
-
- if (!of_property_read_u32(np, "gpmc,wr-data-mux-bus", &val))
- gpmc_t->wr_data_mux_bus = val;
+ of_property_read_u32(np, "gpmc,page-burst-access-ns",
+ &gpmc_t->page_burst_access);
+ of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access);
+ of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle);
+ of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle);
+ of_property_read_u32(np, "gpmc,bus-turnaround-ns",
+ &gpmc_t->bus_turnaround);
+ of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns",
+ &gpmc_t->cycle2cycle_delay);
+ of_property_read_u32(np, "gpmc,wait-monitoring-ns",
+ &gpmc_t->wait_monitoring);
+ of_property_read_u32(np, "gpmc,clk-activation-ns",
+ &gpmc_t->clk_activation);
+
+ /* only applicable to OMAP3+ */
+ of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access);
+ of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns",
+ &gpmc_t->wr_data_mux_bus);
+
+ /* bool timing parameters */
+ p = &gpmc_t->bool_timings;
+
+ p->cycle2cyclediffcsen =
+ of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen");
+ p->cycle2cyclesamecsen =
+ of_property_read_bool(np, "gpmc,cycle2cycle-samecsen");
+ p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay");
+ p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay");
+ p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay");
+ p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay");
+ p->time_para_granularity =
+ of_property_read_bool(np, "gpmc,time-para-granularity");
}
#ifdef CONFIG_MTD_NAND
}
#endif
+/**
+ * gpmc_probe_generic_child - configures the gpmc for a child device
+ * @pdev: pointer to gpmc platform device
+ * @child: pointer to device-tree node for child device
+ *
+ * Allocates and configures a GPMC chip-select for a child device.
+ * Returns 0 on success and appropriate negative error code on failure.
+ */
+static int gpmc_probe_generic_child(struct platform_device *pdev,
+ struct device_node *child)
+{
+ struct gpmc_settings gpmc_s;
+ struct gpmc_timings gpmc_t;
+ struct resource res;
+ unsigned long base;
+ int ret, cs;
+
+ if (of_property_read_u32(child, "reg", &cs) < 0) {
+ dev_err(&pdev->dev, "%s has no 'reg' property\n",
+ child->full_name);
+ return -ENODEV;
+ }
+
+ if (of_address_to_resource(child, 0, &res) < 0) {
+ dev_err(&pdev->dev, "%s has malformed 'reg' property\n",
+ child->full_name);
+ return -ENODEV;
+ }
+
+ ret = gpmc_cs_request(cs, resource_size(&res), &base);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs);
+ return ret;
+ }
+
+ /*
+ * FIXME: gpmc_cs_request() will map the CS to an arbitary
+ * location in the gpmc address space. When booting with
+ * device-tree we want the NOR flash to be mapped to the
+ * location specified in the device-tree blob. So remap the
+ * CS to this location. Once DT migration is complete should
+ * just make gpmc_cs_request() map a specific address.
+ */
+ ret = gpmc_cs_remap(cs, res.start);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "cannot remap GPMC CS %d to 0x%x\n",
+ cs, res.start);
+ goto err;
+ }
+
+ gpmc_read_settings_dt(child, &gpmc_s);
+
+ ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width);
+ if (ret < 0)
+ goto err;
+
+ ret = gpmc_cs_program_settings(cs, &gpmc_s);
+ if (ret < 0)
+ goto err;
+
+ gpmc_read_timings_dt(child, &gpmc_t);
+ gpmc_cs_set_timings(cs, &gpmc_t);
+
+ if (of_platform_device_create(child, NULL, &pdev->dev))
+ return 0;
+
+ dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name);
+ ret = -ENODEV;
+
+err:
+ gpmc_cs_free(cs);
+
+ return ret;
+}
+
static int gpmc_probe_dt(struct platform_device *pdev)
{
int ret;
if (!of_id)
return 0;
+ ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins",
+ &gpmc_nr_waitpins);
+ if (ret < 0) {
+ pr_err("%s: number of wait pins not found!\n", __func__);
+ return ret;
+ }
+
for_each_node_by_name(child, "nand") {
ret = gpmc_probe_nand_child(pdev, child);
if (ret < 0) {
return ret;
}
}
+
+ for_each_node_by_name(child, "nor") {
+ ret = gpmc_probe_generic_child(pdev, child);
+ if (ret < 0) {
+ of_node_put(child);
+ return ret;
+ }
+ }
+
+ for_each_node_by_name(child, "ethernet") {
+ ret = gpmc_probe_generic_child(pdev, child);
+ if (ret < 0) {
+ of_node_put(child);
+ return ret;
+ }
+ }
+
return 0;
}
#else
gpmc_dev = &pdev->dev;
l = gpmc_read_reg(GPMC_REVISION);
+
+ /*
+ * FIXME: Once device-tree migration is complete the below flags
+ * should be populated based upon the device-tree compatible
+ * string. For now just use the IP revision. OMAP3+ devices have
+ * the wr_access and wr_data_mux_bus register fields. OMAP4+
+ * devices support the addr-addr-data multiplex protocol.
+ *
+ * GPMC IP revisions:
+ * - OMAP24xx = 2.0
+ * - OMAP3xxx = 5.0
+ * - OMAP44xx/54xx/AM335x = 6.0
+ */
if (GPMC_REVISION_MAJOR(l) > 0x4)
gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS;
+ if (GPMC_REVISION_MAJOR(l) > 0x5)
+ gpmc_capability |= GPMC_HAS_MUX_AAD;
dev_info(gpmc_dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l),
GPMC_REVISION_MINOR(l));
- rc = gpmc_mem_init();
- if (rc < 0) {
- clk_disable_unprepare(gpmc_l3_clk);
- clk_put(gpmc_l3_clk);
- dev_err(gpmc_dev, "failed to reserve memory\n");
- return rc;
- }
+ gpmc_mem_init();
if (gpmc_setup_irq() < 0)
dev_warn(gpmc_dev, "gpmc_setup_irq failed\n");
/* Now the GPMC is initialised, unreserve the chip-selects */
gpmc_cs_map = 0;
+ if (!pdev->dev.of_node)
+ gpmc_nr_waitpins = GPMC_NR_WAITPINS;
+
rc = gpmc_probe_dt(pdev);
if (rc < 0) {
clk_disable_unprepare(gpmc_l3_clk);
#define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
#define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
#define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
-#define GPMC_CONFIG1_MUXADDDATA (1 << 9)
+#define GPMC_CONFIG1_MUXTYPE(val) ((val & 3) << 8)
#define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
#define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
#define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1))
#define GPMC_IRQ_FIFOEVENTENABLE 0x01
#define GPMC_IRQ_COUNT_EVENT 0x02
+#define GPMC_BURST_4 4 /* 4 word burst */
+#define GPMC_BURST_8 8 /* 8 word burst */
+#define GPMC_BURST_16 16 /* 16 word burst */
+#define GPMC_DEVWIDTH_8BIT 1 /* 8-bit device width */
+#define GPMC_DEVWIDTH_16BIT 2 /* 16-bit device width */
+#define GPMC_MUX_AAD 1 /* Addr-Addr-Data multiplex */
+#define GPMC_MUX_AD 2 /* Addr-Data multiplex */
/* bool type time settings */
struct gpmc_bool_timings {
u8 cyc_wpl; /* write deassertion time in cycles */
u32 cyc_iaa; /* initial access time in cycles */
- bool mux; /* address & data muxed */
- bool sync_write;/* synchronous write */
- bool sync_read; /* synchronous read */
-
/* extra delays */
bool ce_xdelay;
bool avd_xdelay;
bool we_xdelay;
};
+struct gpmc_settings {
+ bool burst_wrap; /* enables wrap bursting */
+ bool burst_read; /* enables read page/burst mode */
+ bool burst_write; /* enables write page/burst mode */
+ bool device_nand; /* device is NAND */
+ bool sync_read; /* enables synchronous reads */
+ bool sync_write; /* enables synchronous writes */
+ bool wait_on_read; /* monitor wait on reads */
+ bool wait_on_write; /* monitor wait on writes */
+ u32 burst_len; /* page/burst length */
+ u32 device_width; /* device bus width (8 or 16 bit) */
+ u32 mux_add_data; /* multiplex address & data */
+ u32 wait_pin; /* wait-pin to be used */
+};
+
extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
- struct gpmc_device_timings *dev_t);
+ struct gpmc_settings *gpmc_s,
+ struct gpmc_device_timings *dev_t);
extern void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
extern int gpmc_get_client_irq(unsigned irq_config);
-extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
-extern unsigned int gpmc_ps_to_ticks(unsigned int time_ps);
extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
-extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
-extern unsigned long gpmc_get_fclk_period(void);
extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
-extern u32 gpmc_cs_read_reg(int cs, int idx);
extern int gpmc_calc_divider(unsigned int sync_clk);
extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
+extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
extern void gpmc_cs_free(int cs);
-extern int gpmc_cs_set_reserved(int cs, int reserved);
-extern int gpmc_cs_reserved(int cs);
extern void omap3_gpmc_save_context(void);
extern void omap3_gpmc_restore_context(void);
-extern int gpmc_cs_configure(int cs, int cmd, int wval);
+extern int gpmc_configure(int cmd, int wval);
+extern void gpmc_read_settings_dt(struct device_node *np,
+ struct gpmc_settings *p);
#endif
* published by the Free Software Foundation.
*/
+#include <linux/err.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/errno.h>
static u8 async_cs, sync_cs;
static unsigned refclk_psec;
+static struct gpmc_settings tusb_async = {
+ .wait_on_read = true,
+ .wait_on_write = true,
+ .device_width = GPMC_DEVWIDTH_16BIT,
+ .mux_add_data = GPMC_MUX_AD,
+};
+
+static struct gpmc_settings tusb_sync = {
+ .burst_read = true,
+ .burst_write = true,
+ .sync_read = true,
+ .sync_write = true,
+ .wait_on_read = true,
+ .wait_on_write = true,
+ .burst_len = GPMC_BURST_16,
+ .device_width = GPMC_DEVWIDTH_16BIT,
+ .mux_add_data = GPMC_MUX_AD,
+};
/* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
memset(&dev_t, 0, sizeof(dev_t));
- dev_t.mux = true;
-
dev_t.t_ceasu = 8 * 1000;
dev_t.t_avdasu = t_acsnh_advnh - 7000;
dev_t.t_ce_avd = 1000;
dev_t.t_wpl = 300;
dev_t.cyc_aavdh_we = 1;
- gpmc_calc_timings(&t, &dev_t);
+ gpmc_calc_timings(&t, &tusb_async, &dev_t);
return gpmc_cs_set_timings(async_cs, &t);
}
memset(&dev_t, 0, sizeof(dev_t));
- dev_t.mux = true;
- dev_t.sync_read = true;
- dev_t.sync_write = true;
-
dev_t.clk = 11100;
dev_t.t_bacc = 1000;
dev_t.t_ces = 1000;
dev_t.cyc_wpl = 6;
dev_t.t_ce_rdyz = 7000;
- gpmc_calc_timings(&t, &dev_t);
+ gpmc_calc_timings(&t, &tusb_sync, &dev_t);
return gpmc_cs_set_timings(sync_cs, &t);
}
return status;
}
tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
+ tusb_async.wait_pin = waitpin;
async_cs = async;
- gpmc_cs_write_reg(async, GPMC_CS_CONFIG1,
- GPMC_CONFIG1_PAGE_LEN(2)
- | GPMC_CONFIG1_WAIT_READ_MON
- | GPMC_CONFIG1_WAIT_WRITE_MON
- | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin)
- | GPMC_CONFIG1_READTYPE_ASYNC
- | GPMC_CONFIG1_WRITETYPE_ASYNC
- | GPMC_CONFIG1_DEVICESIZE_16
- | GPMC_CONFIG1_DEVICETYPE_NOR
- | GPMC_CONFIG1_MUXADDDATA);
+ status = gpmc_cs_program_settings(async_cs, &tusb_async);
+ if (status < 0)
+ return status;
/* SYNC region, primarily for DMA */
status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
return status;
}
tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
+ tusb_sync.wait_pin = waitpin;
sync_cs = sync;
- gpmc_cs_write_reg(sync, GPMC_CS_CONFIG1,
- GPMC_CONFIG1_READMULTIPLE_SUPP
- | GPMC_CONFIG1_READTYPE_SYNC
- | GPMC_CONFIG1_WRITEMULTIPLE_SUPP
- | GPMC_CONFIG1_WRITETYPE_SYNC
- | GPMC_CONFIG1_PAGE_LEN(2)
- | GPMC_CONFIG1_WAIT_READ_MON
- | GPMC_CONFIG1_WAIT_WRITE_MON
- | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin)
- | GPMC_CONFIG1_DEVICESIZE_16
- | GPMC_CONFIG1_DEVICETYPE_NOR
- | GPMC_CONFIG1_MUXADDDATA
- /* fclk divider gets set later */
- );
+
+ status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
+ if (status < 0)
+ return status;
/* IRQ */
status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
projects / deliverable / linux.git / commitdiff
