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/err.h>
12 #include <linux/string.h>
13 #include <linux/types.h>
14 #include <linux/errno.h>
15 #include <linux/delay.h>
16 #include <linux/platform_device.h>
17 #include <linux/gpio.h>
18 #include <linux/export.h>
19 #include <linux/platform_data/usb-omap.h>
21 #include <linux/usb/musb.h>
25 static u8 async_cs, sync_cs;
26 static unsigned refclk_psec;
28 static struct gpmc_settings tusb_async = {
30 .wait_on_write = true,
31 .device_width = GPMC_DEVWIDTH_16BIT,
32 .mux_add_data = GPMC_MUX_AD,
35 static struct gpmc_settings tusb_sync = {
41 .wait_on_write = true,
42 .burst_len = GPMC_BURST_16,
43 .device_width = GPMC_DEVWIDTH_16BIT,
44 .mux_add_data = GPMC_MUX_AD,
47 /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
49 static int tusb_set_async_mode(unsigned sysclk_ps)
51 struct gpmc_device_timings dev_t;
52 struct gpmc_timings t;
53 unsigned t_acsnh_advnh = sysclk_ps + 3000;
55 memset(&dev_t, 0, sizeof(dev_t));
57 dev_t.t_ceasu = 8 * 1000;
58 dev_t.t_avdasu = t_acsnh_advnh - 7000;
59 dev_t.t_ce_avd = 1000;
60 dev_t.t_avdp_r = t_acsnh_advnh;
61 dev_t.t_oeasu = t_acsnh_advnh + 1000;
64 dev_t.t_cez_w = dev_t.t_cez_r;
65 dev_t.t_avdp_w = t_acsnh_advnh;
66 dev_t.t_weasu = t_acsnh_advnh + 1000;
68 dev_t.cyc_aavdh_we = 1;
70 gpmc_calc_timings(&t, &tusb_async, &dev_t);
72 return gpmc_cs_set_timings(async_cs, &t, &tusb_async);
75 static int tusb_set_sync_mode(unsigned sysclk_ps)
77 struct gpmc_device_timings dev_t;
78 struct gpmc_timings t;
79 unsigned t_scsnh_advnh = sysclk_ps + 3000;
81 memset(&dev_t, 0, sizeof(dev_t));
86 dev_t.t_ceasu = 8 * 1000;
87 dev_t.t_avdasu = t_scsnh_advnh - 7000;
88 dev_t.t_ce_avd = 1000;
89 dev_t.t_avdp_r = t_scsnh_advnh;
90 dev_t.cyc_aavdh_oe = 3;
92 dev_t.t_ce_rdyz = 7000;
93 dev_t.t_avdp_w = t_scsnh_advnh;
94 dev_t.cyc_aavdh_we = 3;
97 gpmc_calc_timings(&t, &tusb_sync, &dev_t);
99 return gpmc_cs_set_timings(sync_cs, &t, &tusb_sync);
102 /* tusb driver calls this when it changes the chip's clocking */
103 int tusb6010_platform_retime(unsigned is_refclk)
105 static const char error[] =
106 KERN_ERR "tusb6010 %s retime error %d\n";
114 sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
116 status = tusb_set_async_mode(sysclk_ps);
118 printk(error, "async", status);
121 status = tusb_set_sync_mode(sysclk_ps);
123 printk(error, "sync", status);
127 EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
129 static struct resource tusb_resources[] = {
130 /* Order is significant! The start/end fields
131 * are updated during setup..
133 { /* Asynchronous access */
134 .flags = IORESOURCE_MEM,
136 { /* Synchronous access */
137 .flags = IORESOURCE_MEM,
141 .flags = IORESOURCE_IRQ,
145 static u64 tusb_dmamask = ~(u32)0;
147 static struct platform_device tusb_device = {
151 .dma_mask = &tusb_dmamask,
152 .coherent_dma_mask = 0xffffffff,
154 .num_resources = ARRAY_SIZE(tusb_resources),
155 .resource = tusb_resources,
159 /* this may be called only from board-*.c setup code */
161 tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
162 unsigned ps_refclk, unsigned waitpin,
163 unsigned async, unsigned sync,
164 unsigned irq, unsigned dmachan)
167 static char error[] __initdata =
168 KERN_ERR "tusb6010 init error %d, %d\n";
170 /* ASYNC region, primarily for PIO */
171 status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
172 &tusb_resources[0].start);
174 printk(error, 1, status);
177 tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
178 tusb_async.wait_pin = waitpin;
181 status = gpmc_cs_program_settings(async_cs, &tusb_async);
185 /* SYNC region, primarily for DMA */
186 status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
187 &tusb_resources[1].start);
189 printk(error, 2, status);
192 tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
193 tusb_sync.wait_pin = waitpin;
196 status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
201 status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
203 printk(error, 3, status);
206 tusb_resources[2].start = gpio_to_irq(irq);
208 /* set up memory timings ... can speed them up later */
210 printk(error, 4, status);
213 refclk_psec = ps_refclk;
214 status = tusb6010_platform_retime(1);
216 printk(error, 5, status);
220 /* finish device setup ... */
222 printk(error, 6, status);
225 tusb_device.dev.platform_data = data;
227 /* so far so good ... register the device */
228 status = platform_device_register(&tusb_device);
230 printk(error, 7, status);