2 * linux/arch/arm/mach-omap2/usb-tusb6010.c
4 * Copyright (C) 2006 Nokia Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/string.h>
12 #include <linux/types.h>
13 #include <linux/errno.h>
14 #include <linux/delay.h>
15 #include <linux/platform_device.h>
16 #include <linux/gpio.h>
17 #include <linux/export.h>
18 #include <linux/platform_data/usb-omap.h>
20 #include <linux/usb/musb.h>
26 static u8 async_cs
, sync_cs
;
27 static unsigned refclk_psec
;
30 /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
32 static int tusb_set_async_mode(unsigned sysclk_ps
)
34 struct gpmc_device_timings dev_t
;
35 struct gpmc_timings t
;
36 unsigned t_acsnh_advnh
= sysclk_ps
+ 3000;
38 memset(&dev_t
, 0, sizeof(dev_t
));
42 dev_t
.t_ceasu
= 8 * 1000;
43 dev_t
.t_avdasu
= t_acsnh_advnh
- 7000;
44 dev_t
.t_ce_avd
= 1000;
45 dev_t
.t_avdp_r
= t_acsnh_advnh
;
46 dev_t
.t_oeasu
= t_acsnh_advnh
+ 1000;
49 dev_t
.t_cez_w
= dev_t
.t_cez_r
;
50 dev_t
.t_avdp_w
= t_acsnh_advnh
;
51 dev_t
.t_weasu
= t_acsnh_advnh
+ 1000;
53 dev_t
.cyc_aavdh_we
= 1;
55 gpmc_calc_timings(&t
, &dev_t
);
57 return gpmc_cs_set_timings(async_cs
, &t
);
60 static int tusb_set_sync_mode(unsigned sysclk_ps
)
62 struct gpmc_device_timings dev_t
;
63 struct gpmc_timings t
;
64 unsigned t_scsnh_advnh
= sysclk_ps
+ 3000;
66 memset(&dev_t
, 0, sizeof(dev_t
));
69 dev_t
.sync_read
= true;
70 dev_t
.sync_write
= true;
75 dev_t
.t_ceasu
= 8 * 1000;
76 dev_t
.t_avdasu
= t_scsnh_advnh
- 7000;
77 dev_t
.t_ce_avd
= 1000;
78 dev_t
.t_avdp_r
= t_scsnh_advnh
;
79 dev_t
.cyc_aavdh_oe
= 3;
81 dev_t
.t_ce_rdyz
= 7000;
82 dev_t
.t_avdp_w
= t_scsnh_advnh
;
83 dev_t
.cyc_aavdh_we
= 3;
85 dev_t
.t_ce_rdyz
= 7000;
87 gpmc_calc_timings(&t
, &dev_t
);
89 return gpmc_cs_set_timings(sync_cs
, &t
);
92 /* tusb driver calls this when it changes the chip's clocking */
93 int tusb6010_platform_retime(unsigned is_refclk
)
95 static const char error
[] =
96 KERN_ERR
"tusb6010 %s retime error %d\n";
104 sysclk_ps
= is_refclk
? refclk_psec
: TUSB6010_OSCCLK_60
;
106 status
= tusb_set_async_mode(sysclk_ps
);
108 printk(error
, "async", status
);
111 status
= tusb_set_sync_mode(sysclk_ps
);
113 printk(error
, "sync", status
);
117 EXPORT_SYMBOL_GPL(tusb6010_platform_retime
);
119 static struct resource tusb_resources
[] = {
120 /* Order is significant! The start/end fields
121 * are updated during setup..
123 { /* Asynchronous access */
124 .flags
= IORESOURCE_MEM
,
126 { /* Synchronous access */
127 .flags
= IORESOURCE_MEM
,
131 .flags
= IORESOURCE_IRQ
,
135 static u64 tusb_dmamask
= ~(u32
)0;
137 static struct platform_device tusb_device
= {
141 .dma_mask
= &tusb_dmamask
,
142 .coherent_dma_mask
= 0xffffffff,
144 .num_resources
= ARRAY_SIZE(tusb_resources
),
145 .resource
= tusb_resources
,
149 /* this may be called only from board-*.c setup code */
151 tusb6010_setup_interface(struct musb_hdrc_platform_data
*data
,
152 unsigned ps_refclk
, unsigned waitpin
,
153 unsigned async
, unsigned sync
,
154 unsigned irq
, unsigned dmachan
)
157 static char error
[] __initdata
=
158 KERN_ERR
"tusb6010 init error %d, %d\n";
160 /* ASYNC region, primarily for PIO */
161 status
= gpmc_cs_request(async
, SZ_16M
, (unsigned long *)
162 &tusb_resources
[0].start
);
164 printk(error
, 1, status
);
167 tusb_resources
[0].end
= tusb_resources
[0].start
+ 0x9ff;
169 gpmc_cs_write_reg(async
, GPMC_CS_CONFIG1
,
170 GPMC_CONFIG1_PAGE_LEN(2)
171 | GPMC_CONFIG1_WAIT_READ_MON
172 | GPMC_CONFIG1_WAIT_WRITE_MON
173 | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin
)
174 | GPMC_CONFIG1_READTYPE_ASYNC
175 | GPMC_CONFIG1_WRITETYPE_ASYNC
176 | GPMC_CONFIG1_DEVICESIZE_16
177 | GPMC_CONFIG1_DEVICETYPE_NOR
178 | GPMC_CONFIG1_MUXADDDATA
);
181 /* SYNC region, primarily for DMA */
182 status
= gpmc_cs_request(sync
, SZ_16M
, (unsigned long *)
183 &tusb_resources
[1].start
);
185 printk(error
, 2, status
);
188 tusb_resources
[1].end
= tusb_resources
[1].start
+ 0x9ff;
190 gpmc_cs_write_reg(sync
, GPMC_CS_CONFIG1
,
191 GPMC_CONFIG1_READMULTIPLE_SUPP
192 | GPMC_CONFIG1_READTYPE_SYNC
193 | GPMC_CONFIG1_WRITEMULTIPLE_SUPP
194 | GPMC_CONFIG1_WRITETYPE_SYNC
195 | GPMC_CONFIG1_PAGE_LEN(2)
196 | GPMC_CONFIG1_WAIT_READ_MON
197 | GPMC_CONFIG1_WAIT_WRITE_MON
198 | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin
)
199 | GPMC_CONFIG1_DEVICESIZE_16
200 | GPMC_CONFIG1_DEVICETYPE_NOR
201 | GPMC_CONFIG1_MUXADDDATA
202 /* fclk divider gets set later */
206 status
= gpio_request_one(irq
, GPIOF_IN
, "TUSB6010 irq");
208 printk(error
, 3, status
);
211 tusb_resources
[2].start
= gpio_to_irq(irq
);
213 /* set up memory timings ... can speed them up later */
215 printk(error
, 4, status
);
218 refclk_psec
= ps_refclk
;
219 status
= tusb6010_platform_retime(1);
221 printk(error
, 5, status
);
225 /* finish device setup ... */
227 printk(error
, 6, status
);
230 tusb_device
.dev
.platform_data
= data
;
232 /* REVISIT let the driver know what DMA channels work */
234 tusb_device
.dev
.dma_mask
= NULL
;
236 /* assume OMAP 2420 ES2.0 and later */
237 if (dmachan
& (1 << 0))
238 omap_mux_init_signal("sys_ndmareq0", 0);
239 if (dmachan
& (1 << 1))
240 omap_mux_init_signal("sys_ndmareq1", 0);
241 if (dmachan
& (1 << 2))
242 omap_mux_init_signal("sys_ndmareq2", 0);
243 if (dmachan
& (1 << 3))
244 omap_mux_init_signal("sys_ndmareq3", 0);
245 if (dmachan
& (1 << 4))
246 omap_mux_init_signal("sys_ndmareq4", 0);
247 if (dmachan
& (1 << 5))
248 omap_mux_init_signal("sys_ndmareq5", 0);
251 /* so far so good ... register the device */
252 status
= platform_device_register(&tusb_device
);
254 printk(error
, 7, status
);