* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#undef DEBUG
-
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of_address.h>
#include <linux/of_mtd.h>
#include <linux/of_device.h>
+#include <linux/of_platform.h>
#include <linux/omap-gpmc.h>
#include <linux/mtd/nand.h>
#include <linux/pm_runtime.h>
#define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3))
#define GPMC_CONFIG7_CSVALID (1 << 6)
+#define GPMC_CONFIG7_BASEADDRESS_MASK 0x3f
+#define GPMC_CONFIG7_CSVALID_MASK BIT(6)
+#define GPMC_CONFIG7_MASKADDRESS_OFFSET 8
+#define GPMC_CONFIG7_MASKADDRESS_MASK (0xf << GPMC_CONFIG7_MASKADDRESS_OFFSET)
+/* All CONFIG7 bits except reserved bits */
+#define GPMC_CONFIG7_MASK (GPMC_CONFIG7_BASEADDRESS_MASK | \
+ GPMC_CONFIG7_CSVALID_MASK | \
+ GPMC_CONFIG7_MASKADDRESS_MASK)
+
#define GPMC_DEVICETYPE_NOR 0
#define GPMC_DEVICETYPE_NAND 2
#define GPMC_CONFIG_WRITEPROTECT 0x00000010
}
#ifdef DEBUG
+/**
+ * get_gpmc_timing_reg - read a timing parameter and print DTS settings for it.
+ * @cs: Chip Select Region
+ * @reg: GPMC_CS_CONFIGn register offset.
+ * @st_bit: Start Bit
+ * @end_bit: End Bit. Must be >= @st_bit.
+ * @name: DTS node name, w/o "gpmc,"
+ * @raw: Raw Format Option.
+ * raw format: gpmc,name = <value>
+ * tick format: gpmc,name = <value> /‍* x ns -- y ns; x ticks *‍/
+ * Where x ns -- y ns result in the same tick value.
+ * @noval: Parameter values equal to 0 are not printed.
+ * @shift: Parameter value left shifts @shift, which is then printed instead of value.
+ * @return: Specified timing parameter (after optional @shift).
+ *
+ */
static int get_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
bool raw, bool noval, int shift,
const char *name)
{
u32 l;
- int nr_bits, max_value, mask;
+ int nr_bits;
+ int mask;
l = gpmc_cs_read_reg(cs, reg);
nr_bits = end_bit - st_bit + 1;
- max_value = (1 << nr_bits) - 1;
- mask = max_value << st_bit;
- l = (l & mask) >> st_bit;
+ mask = (1 << nr_bits) - 1;
+ l = (l >> st_bit) & mask;
if (shift)
l = (shift << l);
if (noval && (l == 0))
return 0;
if (!raw) {
- unsigned int time_ns_min, time_ns, time_ns_max;
+ /* DTS tick format for timings in ns */
+ unsigned int time_ns;
+ unsigned int time_ns_min = 0;
- time_ns_min = gpmc_ticks_to_ns(l ? l - 1 : 0);
+ if (l)
+ time_ns_min = gpmc_ticks_to_ns(l - 1) + 1;
time_ns = gpmc_ticks_to_ns(l);
- time_ns_max = gpmc_ticks_to_ns(l + 1 > max_value ?
- max_value : l + 1);
- pr_info("gpmc,%s = <%u> (%u - %u ns, %i ticks)\n",
- name, time_ns, time_ns_min, time_ns_max, l);
+ pr_info("gpmc,%s = <%u> /* %u ns - %u ns; %i ticks */\n",
+ name, time_ns, time_ns_min, time_ns, l);
} else {
+ /* raw format */
pr_info("gpmc,%s = <%u>\n", name, l);
}
l = gpmc_cs_read_reg(cs, reg);
#ifdef DEBUG
- printk(KERN_INFO
- "GPMC CS%d: %-10s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n",
+ pr_info(
+ "GPMC CS%d: %-17s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n",
cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000,
(l >> st_bit) & mask, time);
#endif
if (gpmc_capability & GPMC_HAS_WR_ACCESS)
GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);
- /* caller is expected to have initialized CONFIG1 to cover
- * at least sync vs async
- */
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
- if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) {
#ifdef DEBUG
- printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n",
- cs, (div * gpmc_get_fclk_period()) / 1000, div);
+ pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n",
+ cs, (div * gpmc_get_fclk_period()) / 1000, div);
#endif
- l &= ~0x03;
- l |= (div - 1);
- gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
- }
+ l &= ~0x03;
+ l |= (div - 1);
+ gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
gpmc_cs_bool_timings(cs, &t->bool_timings);
gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings");
if (base & (size - 1))
return -EINVAL;
+ base >>= GPMC_CHUNK_SHIFT;
mask = (1 << GPMC_SECTION_SHIFT) - size;
+ mask >>= GPMC_CHUNK_SHIFT;
+ mask <<= GPMC_CONFIG7_MASKADDRESS_OFFSET;
+
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
- l &= ~0x3f;
- l = (base >> GPMC_CHUNK_SHIFT) & 0x3f;
- l &= ~(0x0f << 8);
- l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8;
+ l &= ~GPMC_CONFIG7_MASK;
+ l |= base & GPMC_CONFIG7_BASEADDRESS_MASK;
+ l |= mask & GPMC_CONFIG7_MASKADDRESS_MASK;
l |= GPMC_CONFIG7_CSVALID;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
gpmc->name = name;
}
-const char *gpmc_cs_get_name(int cs)
+static const char *gpmc_cs_get_name(int cs)
{
struct gpmc_cs_data *gpmc = &gpmc_cs[cs];
gpmc_cs_enable_mem(cs);
no_timings:
- if (of_platform_device_create(child, NULL, &pdev->dev))
- return 0;
+
+ /* create platform device, NULL on error or when disabled */
+ if (!of_platform_device_create(child, NULL, &pdev->dev))
+ goto err_child_fail;
+
+ /* is child a common bus? */
+ if (of_match_node(of_default_bus_match_table, child))
+ /* create children and other common bus children */
+ if (of_platform_populate(child, of_default_bus_match_table,
+ NULL, &pdev->dev))
+ goto err_child_fail;
+
+ return 0;
+
+err_child_fail:
dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name);
ret = -ENODEV;
projects / deliverable / linux.git / blobdiff