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>
27 static u8 async_cs, sync_cs;
28 static unsigned refclk_psec;
30 static struct gpmc_settings tusb_async = {
32 .wait_on_write = true,
33 .device_width = GPMC_DEVWIDTH_16BIT,
34 .mux_add_data = GPMC_MUX_AD,
37 static struct gpmc_settings tusb_sync = {
43 .wait_on_write = true,
44 .burst_len = GPMC_BURST_16,
45 .device_width = GPMC_DEVWIDTH_16BIT,
46 .mux_add_data = GPMC_MUX_AD,
49 /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
51 static int tusb_set_async_mode(unsigned sysclk_ps)
53 struct gpmc_device_timings dev_t;
54 struct gpmc_timings t;
55 unsigned t_acsnh_advnh = sysclk_ps + 3000;
57 memset(&dev_t, 0, sizeof(dev_t));
59 dev_t.t_ceasu = 8 * 1000;
60 dev_t.t_avdasu = t_acsnh_advnh - 7000;
61 dev_t.t_ce_avd = 1000;
62 dev_t.t_avdp_r = t_acsnh_advnh;
63 dev_t.t_oeasu = t_acsnh_advnh + 1000;
66 dev_t.t_cez_w = dev_t.t_cez_r;
67 dev_t.t_avdp_w = t_acsnh_advnh;
68 dev_t.t_weasu = t_acsnh_advnh + 1000;
70 dev_t.cyc_aavdh_we = 1;
72 gpmc_calc_timings(&t, &tusb_async, &dev_t);
74 return gpmc_cs_set_timings(async_cs, &t);
77 static int tusb_set_sync_mode(unsigned sysclk_ps)
79 struct gpmc_device_timings dev_t;
80 struct gpmc_timings t;
81 unsigned t_scsnh_advnh = sysclk_ps + 3000;
83 memset(&dev_t, 0, sizeof(dev_t));
88 dev_t.t_ceasu = 8 * 1000;
89 dev_t.t_avdasu = t_scsnh_advnh - 7000;
90 dev_t.t_ce_avd = 1000;
91 dev_t.t_avdp_r = t_scsnh_advnh;
92 dev_t.cyc_aavdh_oe = 3;
94 dev_t.t_ce_rdyz = 7000;
95 dev_t.t_avdp_w = t_scsnh_advnh;
96 dev_t.cyc_aavdh_we = 3;
98 dev_t.t_ce_rdyz = 7000;
100 gpmc_calc_timings(&t, &tusb_sync, &dev_t);
102 return gpmc_cs_set_timings(sync_cs, &t);
105 /* tusb driver calls this when it changes the chip's clocking */
106 int tusb6010_platform_retime(unsigned is_refclk)
108 static const char error[] =
109 KERN_ERR "tusb6010 %s retime error %d\n";
117 sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
119 status = tusb_set_async_mode(sysclk_ps);
121 printk(error, "async", status);
124 status = tusb_set_sync_mode(sysclk_ps);
126 printk(error, "sync", status);
130 EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
132 static struct resource tusb_resources[] = {
133 /* Order is significant! The start/end fields
134 * are updated during setup..
136 { /* Asynchronous access */
137 .flags = IORESOURCE_MEM,
139 { /* Synchronous access */
140 .flags = IORESOURCE_MEM,
144 .flags = IORESOURCE_IRQ,
148 static u64 tusb_dmamask = ~(u32)0;
150 static struct platform_device tusb_device = {
154 .dma_mask = &tusb_dmamask,
155 .coherent_dma_mask = 0xffffffff,
157 .num_resources = ARRAY_SIZE(tusb_resources),
158 .resource = tusb_resources,
162 /* this may be called only from board-*.c setup code */
164 tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
165 unsigned ps_refclk, unsigned waitpin,
166 unsigned async, unsigned sync,
167 unsigned irq, unsigned dmachan)
170 static char error[] __initdata =
171 KERN_ERR "tusb6010 init error %d, %d\n";
173 /* ASYNC region, primarily for PIO */
174 status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
175 &tusb_resources[0].start);
177 printk(error, 1, status);
180 tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
181 tusb_async.wait_pin = waitpin;
184 status = gpmc_cs_program_settings(async_cs, &tusb_async);
188 /* SYNC region, primarily for DMA */
189 status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
190 &tusb_resources[1].start);
192 printk(error, 2, status);
195 tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
196 tusb_sync.wait_pin = waitpin;
199 status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
204 status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
206 printk(error, 3, status);
209 tusb_resources[2].start = gpio_to_irq(irq);
211 /* set up memory timings ... can speed them up later */
213 printk(error, 4, status);
216 refclk_psec = ps_refclk;
217 status = tusb6010_platform_retime(1);
219 printk(error, 5, status);
223 /* finish device setup ... */
225 printk(error, 6, status);
228 tusb_device.dev.platform_data = data;
230 /* REVISIT let the driver know what DMA channels work */
232 tusb_device.dev.dma_mask = NULL;
234 /* assume OMAP 2420 ES2.0 and later */
235 if (dmachan & (1 << 0))
236 omap_mux_init_signal("sys_ndmareq0", 0);
237 if (dmachan & (1 << 1))
238 omap_mux_init_signal("sys_ndmareq1", 0);
239 if (dmachan & (1 << 2))
240 omap_mux_init_signal("sys_ndmareq2", 0);
241 if (dmachan & (1 << 3))
242 omap_mux_init_signal("sys_ndmareq3", 0);
243 if (dmachan & (1 << 4))
244 omap_mux_init_signal("sys_ndmareq4", 0);
245 if (dmachan & (1 << 5))
246 omap_mux_init_signal("sys_ndmareq5", 0);
249 /* so far so good ... register the device */
250 status = platform_device_register(&tusb_device);
252 printk(error, 7, status);