1
2
3
4
5
6
7
8
9
10
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>
20
21#include <linux/usb/musb.h>
22
23#include "gpmc.h"
24
25static u8 async_cs, sync_cs;
26static unsigned refclk_psec;
27
28static struct gpmc_settings tusb_async = {
29 .wait_on_read = true,
30 .wait_on_write = true,
31 .device_width = GPMC_DEVWIDTH_16BIT,
32 .mux_add_data = GPMC_MUX_AD,
33};
34
35static struct gpmc_settings tusb_sync = {
36 .burst_read = true,
37 .burst_write = true,
38 .sync_read = true,
39 .sync_write = true,
40 .wait_on_read = true,
41 .wait_on_write = true,
42 .burst_len = GPMC_BURST_16,
43 .device_width = GPMC_DEVWIDTH_16BIT,
44 .mux_add_data = GPMC_MUX_AD,
45};
46
47
48
49static int tusb_set_async_mode(unsigned sysclk_ps)
50{
51 struct gpmc_device_timings dev_t;
52 struct gpmc_timings t;
53 unsigned t_acsnh_advnh = sysclk_ps + 3000;
54
55 memset(&dev_t, 0, sizeof(dev_t));
56
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;
62 dev_t.t_oe = 300;
63 dev_t.t_cez_r = 7000;
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;
67 dev_t.t_wpl = 300;
68 dev_t.cyc_aavdh_we = 1;
69
70 gpmc_calc_timings(&t, &tusb_async, &dev_t);
71
72 return gpmc_cs_set_timings(async_cs, &t, &tusb_async);
73}
74
75static int tusb_set_sync_mode(unsigned sysclk_ps)
76{
77 struct gpmc_device_timings dev_t;
78 struct gpmc_timings t;
79 unsigned t_scsnh_advnh = sysclk_ps + 3000;
80
81 memset(&dev_t, 0, sizeof(dev_t));
82
83 dev_t.clk = 11100;
84 dev_t.t_bacc = 1000;
85 dev_t.t_ces = 1000;
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;
91 dev_t.cyc_oe = 5;
92 dev_t.t_ce_rdyz = 7000;
93 dev_t.t_avdp_w = t_scsnh_advnh;
94 dev_t.cyc_aavdh_we = 3;
95 dev_t.cyc_wpl = 6;
96
97 gpmc_calc_timings(&t, &tusb_sync, &dev_t);
98
99 return gpmc_cs_set_timings(sync_cs, &t, &tusb_sync);
100}
101
102
103int tusb6010_platform_retime(unsigned is_refclk)
104{
105 static const char error[] =
106 KERN_ERR "tusb6010 %s retime error %d\n";
107
108 unsigned sysclk_ps;
109 int status;
110
111 if (!refclk_psec)
112 return -ENODEV;
113
114 sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
115
116 status = tusb_set_async_mode(sysclk_ps);
117 if (status < 0) {
118 printk(error, "async", status);
119 goto done;
120 }
121 status = tusb_set_sync_mode(sysclk_ps);
122 if (status < 0)
123 printk(error, "sync", status);
124done:
125 return status;
126}
127EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
128
129static struct resource tusb_resources[] = {
130
131
132
133 {
134 .flags = IORESOURCE_MEM,
135 },
136 {
137 .flags = IORESOURCE_MEM,
138 },
139 {
140 .name = "mc",
141 .flags = IORESOURCE_IRQ,
142 },
143};
144
145static u64 tusb_dmamask = ~(u32)0;
146
147static struct platform_device tusb_device = {
148 .name = "musb-tusb",
149 .id = -1,
150 .dev = {
151 .dma_mask = &tusb_dmamask,
152 .coherent_dma_mask = 0xffffffff,
153 },
154 .num_resources = ARRAY_SIZE(tusb_resources),
155 .resource = tusb_resources,
156};
157
158
159
160int __init
161tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
162 unsigned ps_refclk, unsigned waitpin,
163 unsigned async, unsigned sync,
164 unsigned irq, unsigned dmachan)
165{
166 int status;
167 static char error[] __initdata =
168 KERN_ERR "tusb6010 init error %d, %d\n";
169
170
171 status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
172 &tusb_resources[0].start);
173 if (status < 0) {
174 printk(error, 1, status);
175 return status;
176 }
177 tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
178 tusb_async.wait_pin = waitpin;
179 async_cs = async;
180
181 status = gpmc_cs_program_settings(async_cs, &tusb_async);
182 if (status < 0)
183 return status;
184
185
186 status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
187 &tusb_resources[1].start);
188 if (status < 0) {
189 printk(error, 2, status);
190 return status;
191 }
192 tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
193 tusb_sync.wait_pin = waitpin;
194 sync_cs = sync;
195
196 status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
197 if (status < 0)
198 return status;
199
200
201 status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
202 if (status < 0) {
203 printk(error, 3, status);
204 return status;
205 }
206 tusb_resources[2].start = gpio_to_irq(irq);
207
208
209 if (!ps_refclk) {
210 printk(error, 4, status);
211 return -ENODEV;
212 }
213 refclk_psec = ps_refclk;
214 status = tusb6010_platform_retime(1);
215 if (status < 0) {
216 printk(error, 5, status);
217 return status;
218 }
219
220
221 if (!data) {
222 printk(error, 6, status);
223 return -ENODEV;
224 }
225 tusb_device.dev.platform_data = data;
226
227
228 status = platform_device_register(&tusb_device);
229 if (status < 0) {
230 printk(error, 7, status);
231 return status;
232 }
233 return 0;
234}
235