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c1ed6407 DB |
1 | /* |
2 | * linux/arch/arm/mach-omap2/usb-tusb6010.c | |
3 | * | |
4 | * Copyright (C) 2006 Nokia Corporation | |
5 | * | |
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. | |
9 | */ | |
10 | ||
012e3386 | 11 | #include <linux/err.h> |
d44b28c4 | 12 | #include <linux/string.h> |
c1ed6407 DB |
13 | #include <linux/types.h> |
14 | #include <linux/errno.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/platform_device.h> | |
f2d18fea | 17 | #include <linux/gpio.h> |
dc28094b | 18 | #include <linux/export.h> |
e8c4a7ac | 19 | #include <linux/platform_data/usb-omap.h> |
c1ed6407 DB |
20 | |
21 | #include <linux/usb/musb.h> | |
22 | ||
3ef5d007 | 23 | #include "gpmc.h" |
c1ed6407 | 24 | |
f99bf16d | 25 | #include "mux.h" |
c1ed6407 DB |
26 | |
27 | static u8 async_cs, sync_cs; | |
28 | static unsigned refclk_psec; | |
29 | ||
c3be5b45 | 30 | static struct gpmc_settings tusb_async = { |
012e3386 JH |
31 | .wait_on_read = true, |
32 | .wait_on_write = true, | |
33 | .device_width = GPMC_DEVWIDTH_16BIT, | |
c3be5b45 JH |
34 | .mux_add_data = GPMC_MUX_AD, |
35 | }; | |
36 | ||
37 | static struct gpmc_settings tusb_sync = { | |
012e3386 JH |
38 | .burst_read = true, |
39 | .burst_write = true, | |
c3be5b45 JH |
40 | .sync_read = true, |
41 | .sync_write = true, | |
012e3386 JH |
42 | .wait_on_read = true, |
43 | .wait_on_write = true, | |
44 | .burst_len = GPMC_BURST_16, | |
45 | .device_width = GPMC_DEVWIDTH_16BIT, | |
c3be5b45 JH |
46 | .mux_add_data = GPMC_MUX_AD, |
47 | }; | |
c1ed6407 | 48 | |
c1ed6407 DB |
49 | /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */ |
50 | ||
47acde16 | 51 | static int tusb_set_async_mode(unsigned sysclk_ps) |
c1ed6407 | 52 | { |
47acde16 | 53 | struct gpmc_device_timings dev_t; |
c1ed6407 DB |
54 | struct gpmc_timings t; |
55 | unsigned t_acsnh_advnh = sysclk_ps + 3000; | |
c1ed6407 | 56 | |
47acde16 | 57 | memset(&dev_t, 0, sizeof(dev_t)); |
c1ed6407 | 58 | |
47acde16 AM |
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; | |
64 | dev_t.t_oe = 300; | |
65 | dev_t.t_cez_r = 7000; | |
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; | |
69 | dev_t.t_wpl = 300; | |
70 | dev_t.cyc_aavdh_we = 1; | |
c1ed6407 | 71 | |
c3be5b45 | 72 | gpmc_calc_timings(&t, &tusb_async, &dev_t); |
c1ed6407 DB |
73 | |
74 | return gpmc_cs_set_timings(async_cs, &t); | |
75 | } | |
76 | ||
47acde16 | 77 | static int tusb_set_sync_mode(unsigned sysclk_ps) |
c1ed6407 | 78 | { |
47acde16 | 79 | struct gpmc_device_timings dev_t; |
c1ed6407 DB |
80 | struct gpmc_timings t; |
81 | unsigned t_scsnh_advnh = sysclk_ps + 3000; | |
c1ed6407 | 82 | |
47acde16 AM |
83 | memset(&dev_t, 0, sizeof(dev_t)); |
84 | ||
47acde16 AM |
85 | dev_t.clk = 11100; |
86 | dev_t.t_bacc = 1000; | |
87 | dev_t.t_ces = 1000; | |
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; | |
93 | dev_t.cyc_oe = 5; | |
94 | dev_t.t_ce_rdyz = 7000; | |
95 | dev_t.t_avdp_w = t_scsnh_advnh; | |
96 | dev_t.cyc_aavdh_we = 3; | |
97 | dev_t.cyc_wpl = 6; | |
47acde16 | 98 | |
c3be5b45 | 99 | gpmc_calc_timings(&t, &tusb_sync, &dev_t); |
559d94b0 | 100 | |
c1ed6407 DB |
101 | return gpmc_cs_set_timings(sync_cs, &t); |
102 | } | |
103 | ||
c1ed6407 DB |
104 | /* tusb driver calls this when it changes the chip's clocking */ |
105 | int tusb6010_platform_retime(unsigned is_refclk) | |
106 | { | |
107 | static const char error[] = | |
108 | KERN_ERR "tusb6010 %s retime error %d\n"; | |
109 | ||
c1ed6407 DB |
110 | unsigned sysclk_ps; |
111 | int status; | |
112 | ||
47acde16 | 113 | if (!refclk_psec) |
c1ed6407 DB |
114 | return -ENODEV; |
115 | ||
116 | sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60; | |
117 | ||
47acde16 | 118 | status = tusb_set_async_mode(sysclk_ps); |
c1ed6407 DB |
119 | if (status < 0) { |
120 | printk(error, "async", status); | |
121 | goto done; | |
122 | } | |
47acde16 | 123 | status = tusb_set_sync_mode(sysclk_ps); |
c1ed6407 DB |
124 | if (status < 0) |
125 | printk(error, "sync", status); | |
126 | done: | |
127 | return status; | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(tusb6010_platform_retime); | |
130 | ||
131 | static struct resource tusb_resources[] = { | |
132 | /* Order is significant! The start/end fields | |
133 | * are updated during setup.. | |
134 | */ | |
135 | { /* Asynchronous access */ | |
136 | .flags = IORESOURCE_MEM, | |
137 | }, | |
138 | { /* Synchronous access */ | |
139 | .flags = IORESOURCE_MEM, | |
140 | }, | |
141 | { /* IRQ */ | |
6ec1e077 | 142 | .name = "mc", |
c1ed6407 DB |
143 | .flags = IORESOURCE_IRQ, |
144 | }, | |
145 | }; | |
146 | ||
147 | static u64 tusb_dmamask = ~(u32)0; | |
148 | ||
149 | static struct platform_device tusb_device = { | |
18688fbe | 150 | .name = "musb-tusb", |
c1ed6407 DB |
151 | .id = -1, |
152 | .dev = { | |
153 | .dma_mask = &tusb_dmamask, | |
154 | .coherent_dma_mask = 0xffffffff, | |
155 | }, | |
156 | .num_resources = ARRAY_SIZE(tusb_resources), | |
157 | .resource = tusb_resources, | |
158 | }; | |
159 | ||
160 | ||
161 | /* this may be called only from board-*.c setup code */ | |
162 | int __init | |
163 | tusb6010_setup_interface(struct musb_hdrc_platform_data *data, | |
164 | unsigned ps_refclk, unsigned waitpin, | |
165 | unsigned async, unsigned sync, | |
166 | unsigned irq, unsigned dmachan) | |
167 | { | |
168 | int status; | |
169 | static char error[] __initdata = | |
170 | KERN_ERR "tusb6010 init error %d, %d\n"; | |
171 | ||
172 | /* ASYNC region, primarily for PIO */ | |
173 | status = gpmc_cs_request(async, SZ_16M, (unsigned long *) | |
174 | &tusb_resources[0].start); | |
175 | if (status < 0) { | |
176 | printk(error, 1, status); | |
177 | return status; | |
178 | } | |
179 | tusb_resources[0].end = tusb_resources[0].start + 0x9ff; | |
012e3386 | 180 | tusb_async.wait_pin = waitpin; |
c1ed6407 | 181 | async_cs = async; |
c1ed6407 | 182 | |
012e3386 JH |
183 | status = gpmc_cs_program_settings(async_cs, &tusb_async); |
184 | if (status < 0) | |
185 | return status; | |
c1ed6407 DB |
186 | |
187 | /* SYNC region, primarily for DMA */ | |
188 | status = gpmc_cs_request(sync, SZ_16M, (unsigned long *) | |
189 | &tusb_resources[1].start); | |
190 | if (status < 0) { | |
191 | printk(error, 2, status); | |
192 | return status; | |
193 | } | |
194 | tusb_resources[1].end = tusb_resources[1].start + 0x9ff; | |
012e3386 | 195 | tusb_sync.wait_pin = waitpin; |
c1ed6407 | 196 | sync_cs = sync; |
012e3386 JH |
197 | |
198 | status = gpmc_cs_program_settings(sync_cs, &tusb_sync); | |
199 | if (status < 0) | |
200 | return status; | |
c1ed6407 DB |
201 | |
202 | /* IRQ */ | |
bc593f5d | 203 | status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq"); |
c1ed6407 DB |
204 | if (status < 0) { |
205 | printk(error, 3, status); | |
206 | return status; | |
207 | } | |
3d09b33f | 208 | tusb_resources[2].start = gpio_to_irq(irq); |
c1ed6407 DB |
209 | |
210 | /* set up memory timings ... can speed them up later */ | |
211 | if (!ps_refclk) { | |
212 | printk(error, 4, status); | |
213 | return -ENODEV; | |
214 | } | |
215 | refclk_psec = ps_refclk; | |
216 | status = tusb6010_platform_retime(1); | |
217 | if (status < 0) { | |
218 | printk(error, 5, status); | |
219 | return status; | |
220 | } | |
221 | ||
222 | /* finish device setup ... */ | |
223 | if (!data) { | |
224 | printk(error, 6, status); | |
225 | return -ENODEV; | |
226 | } | |
c1ed6407 DB |
227 | tusb_device.dev.platform_data = data; |
228 | ||
229 | /* REVISIT let the driver know what DMA channels work */ | |
230 | if (!dmachan) | |
231 | tusb_device.dev.dma_mask = NULL; | |
232 | else { | |
233 | /* assume OMAP 2420 ES2.0 and later */ | |
234 | if (dmachan & (1 << 0)) | |
f99bf16d | 235 | omap_mux_init_signal("sys_ndmareq0", 0); |
c1ed6407 | 236 | if (dmachan & (1 << 1)) |
f99bf16d | 237 | omap_mux_init_signal("sys_ndmareq1", 0); |
c1ed6407 | 238 | if (dmachan & (1 << 2)) |
f99bf16d | 239 | omap_mux_init_signal("sys_ndmareq2", 0); |
c1ed6407 | 240 | if (dmachan & (1 << 3)) |
f99bf16d | 241 | omap_mux_init_signal("sys_ndmareq3", 0); |
c1ed6407 | 242 | if (dmachan & (1 << 4)) |
f99bf16d | 243 | omap_mux_init_signal("sys_ndmareq4", 0); |
c1ed6407 | 244 | if (dmachan & (1 << 5)) |
f99bf16d | 245 | omap_mux_init_signal("sys_ndmareq5", 0); |
c1ed6407 DB |
246 | } |
247 | ||
248 | /* so far so good ... register the device */ | |
249 | status = platform_device_register(&tusb_device); | |
250 | if (status < 0) { | |
251 | printk(error, 7, status); | |
252 | return status; | |
253 | } | |
254 | return 0; | |
255 | } |