Loading...
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
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
19#include <linux/usb/musb.h>
20
21#include <plat/gpmc.h>
22
23#include "mux.h"
24
25static u8 async_cs, sync_cs;
26static unsigned refclk_psec;
27
28
29/* t2_ps, when quantized to fclk units, must happen no earlier than
30 * the clock after after t1_NS.
31 *
32 * Return a possibly updated value of t2_ps, converted to nsec.
33 */
34static unsigned
35next_clk(unsigned t1_NS, unsigned t2_ps, unsigned fclk_ps)
36{
37 unsigned t1_ps = t1_NS * 1000;
38 unsigned t1_f, t2_f;
39
40 if ((t1_ps + fclk_ps) < t2_ps)
41 return t2_ps / 1000;
42
43 t1_f = (t1_ps + fclk_ps - 1) / fclk_ps;
44 t2_f = (t2_ps + fclk_ps - 1) / fclk_ps;
45
46 if (t1_f >= t2_f)
47 t2_f = t1_f + 1;
48
49 return (t2_f * fclk_ps) / 1000;
50}
51
52/* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
53
54static int tusb_set_async_mode(unsigned sysclk_ps, unsigned fclk_ps)
55{
56 struct gpmc_timings t;
57 unsigned t_acsnh_advnh = sysclk_ps + 3000;
58 unsigned tmp;
59
60 memset(&t, 0, sizeof(t));
61
62 /* CS_ON = t_acsnh_acsnl */
63 t.cs_on = 8;
64 /* ADV_ON = t_acsnh_advnh - t_advn */
65 t.adv_on = next_clk(t.cs_on, t_acsnh_advnh - 7000, fclk_ps);
66
67 /*
68 * READ ... from omap2420 TRM fig 12-13
69 */
70
71 /* ADV_RD_OFF = t_acsnh_advnh */
72 t.adv_rd_off = next_clk(t.adv_on, t_acsnh_advnh, fclk_ps);
73
74 /* OE_ON = t_acsnh_advnh + t_advn_oen (then wait for nRDY) */
75 t.oe_on = next_clk(t.adv_on, t_acsnh_advnh + 1000, fclk_ps);
76
77 /* ACCESS = counters continue only after nRDY */
78 tmp = t.oe_on * 1000 + 300;
79 t.access = next_clk(t.oe_on, tmp, fclk_ps);
80
81 /* OE_OFF = after data gets sampled */
82 tmp = t.access * 1000;
83 t.oe_off = next_clk(t.access, tmp, fclk_ps);
84
85 t.cs_rd_off = t.oe_off;
86
87 tmp = t.cs_rd_off * 1000 + 7000 /* t_acsn_rdy_z */;
88 t.rd_cycle = next_clk(t.cs_rd_off, tmp, fclk_ps);
89
90 /*
91 * WRITE ... from omap2420 TRM fig 12-15
92 */
93
94 /* ADV_WR_OFF = t_acsnh_advnh */
95 t.adv_wr_off = t.adv_rd_off;
96
97 /* WE_ON = t_acsnh_advnh + t_advn_wen (then wait for nRDY) */
98 t.we_on = next_clk(t.adv_wr_off, t_acsnh_advnh + 1000, fclk_ps);
99
100 /* WE_OFF = after data gets sampled */
101 tmp = t.we_on * 1000 + 300;
102 t.we_off = next_clk(t.we_on, tmp, fclk_ps);
103
104 t.cs_wr_off = t.we_off;
105
106 tmp = t.cs_wr_off * 1000 + 7000 /* t_acsn_rdy_z */;
107 t.wr_cycle = next_clk(t.cs_wr_off, tmp, fclk_ps);
108
109 return gpmc_cs_set_timings(async_cs, &t);
110}
111
112static int tusb_set_sync_mode(unsigned sysclk_ps, unsigned fclk_ps)
113{
114 struct gpmc_timings t;
115 unsigned t_scsnh_advnh = sysclk_ps + 3000;
116 unsigned tmp;
117
118 memset(&t, 0, sizeof(t));
119 t.cs_on = 8;
120
121 /* ADV_ON = t_acsnh_advnh - t_advn */
122 t.adv_on = next_clk(t.cs_on, t_scsnh_advnh - 7000, fclk_ps);
123
124 /* GPMC_CLK rate = fclk rate / div */
125 t.sync_clk = 11100 /* 11.1 nsec */;
126 tmp = (t.sync_clk + fclk_ps - 1) / fclk_ps;
127 if (tmp > 4)
128 return -ERANGE;
129 if (tmp == 0)
130 tmp = 1;
131 t.page_burst_access = (fclk_ps * tmp) / 1000;
132
133 /*
134 * READ ... based on omap2420 TRM fig 12-19, 12-20
135 */
136
137 /* ADV_RD_OFF = t_scsnh_advnh */
138 t.adv_rd_off = next_clk(t.adv_on, t_scsnh_advnh, fclk_ps);
139
140 /* OE_ON = t_scsnh_advnh + t_advn_oen * fclk_ps (then wait for nRDY) */
141 tmp = (t.adv_rd_off * 1000) + (3 * fclk_ps);
142 t.oe_on = next_clk(t.adv_on, tmp, fclk_ps);
143
144 /* ACCESS = number of clock cycles after t_adv_eon */
145 tmp = (t.oe_on * 1000) + (5 * fclk_ps);
146 t.access = next_clk(t.oe_on, tmp, fclk_ps);
147
148 /* OE_OFF = after data gets sampled */
149 tmp = (t.access * 1000) + (1 * fclk_ps);
150 t.oe_off = next_clk(t.access, tmp, fclk_ps);
151
152 t.cs_rd_off = t.oe_off;
153
154 tmp = t.cs_rd_off * 1000 + 7000 /* t_scsn_rdy_z */;
155 t.rd_cycle = next_clk(t.cs_rd_off, tmp, fclk_ps);
156
157 /*
158 * WRITE ... based on omap2420 TRM fig 12-21
159 */
160
161 /* ADV_WR_OFF = t_scsnh_advnh */
162 t.adv_wr_off = t.adv_rd_off;
163
164 /* WE_ON = t_scsnh_advnh + t_advn_wen * fclk_ps (then wait for nRDY) */
165 tmp = (t.adv_wr_off * 1000) + (3 * fclk_ps);
166 t.we_on = next_clk(t.adv_wr_off, tmp, fclk_ps);
167
168 /* WE_OFF = number of clock cycles after t_adv_wen */
169 tmp = (t.we_on * 1000) + (6 * fclk_ps);
170 t.we_off = next_clk(t.we_on, tmp, fclk_ps);
171
172 t.cs_wr_off = t.we_off;
173
174 tmp = t.cs_wr_off * 1000 + 7000 /* t_scsn_rdy_z */;
175 t.wr_cycle = next_clk(t.cs_wr_off, tmp, fclk_ps);
176
177 return gpmc_cs_set_timings(sync_cs, &t);
178}
179
180extern unsigned long gpmc_get_fclk_period(void);
181
182/* tusb driver calls this when it changes the chip's clocking */
183int tusb6010_platform_retime(unsigned is_refclk)
184{
185 static const char error[] =
186 KERN_ERR "tusb6010 %s retime error %d\n";
187
188 unsigned fclk_ps = gpmc_get_fclk_period();
189 unsigned sysclk_ps;
190 int status;
191
192 if (!refclk_psec || fclk_ps == 0)
193 return -ENODEV;
194
195 sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
196
197 status = tusb_set_async_mode(sysclk_ps, fclk_ps);
198 if (status < 0) {
199 printk(error, "async", status);
200 goto done;
201 }
202 status = tusb_set_sync_mode(sysclk_ps, fclk_ps);
203 if (status < 0)
204 printk(error, "sync", status);
205done:
206 return status;
207}
208EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
209
210static struct resource tusb_resources[] = {
211 /* Order is significant! The start/end fields
212 * are updated during setup..
213 */
214 { /* Asynchronous access */
215 .flags = IORESOURCE_MEM,
216 },
217 { /* Synchronous access */
218 .flags = IORESOURCE_MEM,
219 },
220 { /* IRQ */
221 .name = "mc",
222 .flags = IORESOURCE_IRQ,
223 },
224};
225
226static u64 tusb_dmamask = ~(u32)0;
227
228static struct platform_device tusb_device = {
229 .name = "musb-tusb",
230 .id = -1,
231 .dev = {
232 .dma_mask = &tusb_dmamask,
233 .coherent_dma_mask = 0xffffffff,
234 },
235 .num_resources = ARRAY_SIZE(tusb_resources),
236 .resource = tusb_resources,
237};
238
239
240/* this may be called only from board-*.c setup code */
241int __init
242tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
243 unsigned ps_refclk, unsigned waitpin,
244 unsigned async, unsigned sync,
245 unsigned irq, unsigned dmachan)
246{
247 int status;
248 static char error[] __initdata =
249 KERN_ERR "tusb6010 init error %d, %d\n";
250
251 /* ASYNC region, primarily for PIO */
252 status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
253 &tusb_resources[0].start);
254 if (status < 0) {
255 printk(error, 1, status);
256 return status;
257 }
258 tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
259 async_cs = async;
260 gpmc_cs_write_reg(async, GPMC_CS_CONFIG1,
261 GPMC_CONFIG1_PAGE_LEN(2)
262 | GPMC_CONFIG1_WAIT_READ_MON
263 | GPMC_CONFIG1_WAIT_WRITE_MON
264 | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin)
265 | GPMC_CONFIG1_READTYPE_ASYNC
266 | GPMC_CONFIG1_WRITETYPE_ASYNC
267 | GPMC_CONFIG1_DEVICESIZE_16
268 | GPMC_CONFIG1_DEVICETYPE_NOR
269 | GPMC_CONFIG1_MUXADDDATA);
270
271
272 /* SYNC region, primarily for DMA */
273 status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
274 &tusb_resources[1].start);
275 if (status < 0) {
276 printk(error, 2, status);
277 return status;
278 }
279 tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
280 sync_cs = sync;
281 gpmc_cs_write_reg(sync, GPMC_CS_CONFIG1,
282 GPMC_CONFIG1_READMULTIPLE_SUPP
283 | GPMC_CONFIG1_READTYPE_SYNC
284 | GPMC_CONFIG1_WRITEMULTIPLE_SUPP
285 | GPMC_CONFIG1_WRITETYPE_SYNC
286 | GPMC_CONFIG1_CLKACTIVATIONTIME(1)
287 | GPMC_CONFIG1_PAGE_LEN(2)
288 | GPMC_CONFIG1_WAIT_READ_MON
289 | GPMC_CONFIG1_WAIT_WRITE_MON
290 | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin)
291 | GPMC_CONFIG1_DEVICESIZE_16
292 | GPMC_CONFIG1_DEVICETYPE_NOR
293 | GPMC_CONFIG1_MUXADDDATA
294 /* fclk divider gets set later */
295 );
296
297 /* IRQ */
298 status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
299 if (status < 0) {
300 printk(error, 3, status);
301 return status;
302 }
303 tusb_resources[2].start = gpio_to_irq(irq);
304
305 /* set up memory timings ... can speed them up later */
306 if (!ps_refclk) {
307 printk(error, 4, status);
308 return -ENODEV;
309 }
310 refclk_psec = ps_refclk;
311 status = tusb6010_platform_retime(1);
312 if (status < 0) {
313 printk(error, 5, status);
314 return status;
315 }
316
317 /* finish device setup ... */
318 if (!data) {
319 printk(error, 6, status);
320 return -ENODEV;
321 }
322 tusb_device.dev.platform_data = data;
323
324 /* REVISIT let the driver know what DMA channels work */
325 if (!dmachan)
326 tusb_device.dev.dma_mask = NULL;
327 else {
328 /* assume OMAP 2420 ES2.0 and later */
329 if (dmachan & (1 << 0))
330 omap_mux_init_signal("sys_ndmareq0", 0);
331 if (dmachan & (1 << 1))
332 omap_mux_init_signal("sys_ndmareq1", 0);
333 if (dmachan & (1 << 2))
334 omap_mux_init_signal("sys_ndmareq2", 0);
335 if (dmachan & (1 << 3))
336 omap_mux_init_signal("sys_ndmareq3", 0);
337 if (dmachan & (1 << 4))
338 omap_mux_init_signal("sys_ndmareq4", 0);
339 if (dmachan & (1 << 5))
340 omap_mux_init_signal("sys_ndmareq5", 0);
341 }
342
343 /* so far so good ... register the device */
344 status = platform_device_register(&tusb_device);
345 if (status < 0) {
346 printk(error, 7, status);
347 return status;
348 }
349 return 0;
350}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-omap2/usb-tusb6010.c
4 *
5 * Copyright (C) 2006 Nokia Corporation
6 */
7
8#include <linux/err.h>
9#include <linux/string.h>
10#include <linux/types.h>
11#include <linux/errno.h>
12#include <linux/delay.h>
13#include <linux/platform_device.h>
14#include <linux/export.h>
15#include <linux/platform_data/usb-omap.h>
16
17#include <linux/usb/musb.h>
18
19#include "usb-tusb6010.h"
20#include "gpmc.h"
21
22static u8 async_cs, sync_cs;
23static unsigned refclk_psec;
24
25static struct gpmc_settings tusb_async = {
26 .wait_on_read = true,
27 .wait_on_write = true,
28 .device_width = GPMC_DEVWIDTH_16BIT,
29 .mux_add_data = GPMC_MUX_AD,
30};
31
32static struct gpmc_settings tusb_sync = {
33 .burst_read = true,
34 .burst_write = true,
35 .sync_read = true,
36 .sync_write = true,
37 .wait_on_read = true,
38 .wait_on_write = true,
39 .burst_len = GPMC_BURST_16,
40 .device_width = GPMC_DEVWIDTH_16BIT,
41 .mux_add_data = GPMC_MUX_AD,
42};
43
44/* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
45
46static int tusb_set_async_mode(unsigned sysclk_ps)
47{
48 struct gpmc_device_timings dev_t;
49 struct gpmc_timings t;
50 unsigned t_acsnh_advnh = sysclk_ps + 3000;
51
52 memset(&dev_t, 0, sizeof(dev_t));
53
54 dev_t.t_ceasu = 8 * 1000;
55 dev_t.t_avdasu = t_acsnh_advnh - 7000;
56 dev_t.t_ce_avd = 1000;
57 dev_t.t_avdp_r = t_acsnh_advnh;
58 dev_t.t_oeasu = t_acsnh_advnh + 1000;
59 dev_t.t_oe = 300;
60 dev_t.t_cez_r = 7000;
61 dev_t.t_cez_w = dev_t.t_cez_r;
62 dev_t.t_avdp_w = t_acsnh_advnh;
63 dev_t.t_weasu = t_acsnh_advnh + 1000;
64 dev_t.t_wpl = 300;
65 dev_t.cyc_aavdh_we = 1;
66
67 gpmc_calc_timings(&t, &tusb_async, &dev_t);
68
69 return gpmc_cs_set_timings(async_cs, &t, &tusb_async);
70}
71
72static int tusb_set_sync_mode(unsigned sysclk_ps)
73{
74 struct gpmc_device_timings dev_t;
75 struct gpmc_timings t;
76 unsigned t_scsnh_advnh = sysclk_ps + 3000;
77
78 memset(&dev_t, 0, sizeof(dev_t));
79
80 dev_t.clk = 11100;
81 dev_t.t_bacc = 1000;
82 dev_t.t_ces = 1000;
83 dev_t.t_ceasu = 8 * 1000;
84 dev_t.t_avdasu = t_scsnh_advnh - 7000;
85 dev_t.t_ce_avd = 1000;
86 dev_t.t_avdp_r = t_scsnh_advnh;
87 dev_t.cyc_aavdh_oe = 3;
88 dev_t.cyc_oe = 5;
89 dev_t.t_ce_rdyz = 7000;
90 dev_t.t_avdp_w = t_scsnh_advnh;
91 dev_t.cyc_aavdh_we = 3;
92 dev_t.cyc_wpl = 6;
93
94 gpmc_calc_timings(&t, &tusb_sync, &dev_t);
95
96 return gpmc_cs_set_timings(sync_cs, &t, &tusb_sync);
97}
98
99/* tusb driver calls this when it changes the chip's clocking */
100static int tusb6010_platform_retime(unsigned is_refclk)
101{
102 static const char error[] =
103 KERN_ERR "tusb6010 %s retime error %d\n";
104
105 unsigned sysclk_ps;
106 int status;
107
108 if (!refclk_psec)
109 return -ENODEV;
110
111 sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
112
113 status = tusb_set_async_mode(sysclk_ps);
114 if (status < 0) {
115 printk(error, "async", status);
116 goto done;
117 }
118 status = tusb_set_sync_mode(sysclk_ps);
119 if (status < 0)
120 printk(error, "sync", status);
121done:
122 return status;
123}
124
125static struct resource tusb_resources[] = {
126 /* Order is significant! The start/end fields
127 * are updated during setup..
128 */
129 { /* Asynchronous access */
130 .flags = IORESOURCE_MEM,
131 },
132 { /* Synchronous access */
133 .flags = IORESOURCE_MEM,
134 },
135};
136
137static u64 tusb_dmamask = ~(u32)0;
138
139static struct platform_device tusb_device = {
140 .name = "musb-tusb",
141 .id = -1,
142 .dev = {
143 .dma_mask = &tusb_dmamask,
144 .coherent_dma_mask = 0xffffffff,
145 },
146 .num_resources = ARRAY_SIZE(tusb_resources),
147 .resource = tusb_resources,
148};
149
150
151/* this may be called only from board-*.c setup code */
152int __init tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
153 unsigned int ps_refclk, unsigned int waitpin,
154 unsigned int async, unsigned int sync,
155 unsigned int dmachan)
156{
157 int status;
158 static char error[] __initdata =
159 KERN_ERR "tusb6010 init error %d, %d\n";
160
161 /* ASYNC region, primarily for PIO */
162 status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
163 &tusb_resources[0].start);
164 if (status < 0) {
165 printk(error, 1, status);
166 return status;
167 }
168 tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
169 tusb_async.wait_pin = waitpin;
170 async_cs = async;
171
172 status = gpmc_cs_program_settings(async_cs, &tusb_async);
173 if (status < 0)
174 return status;
175
176 /* SYNC region, primarily for DMA */
177 status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
178 &tusb_resources[1].start);
179 if (status < 0) {
180 printk(error, 2, status);
181 return status;
182 }
183 tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
184 tusb_sync.wait_pin = waitpin;
185 sync_cs = sync;
186
187 status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
188 if (status < 0)
189 return status;
190
191 /* set up memory timings ... can speed them up later */
192 if (!ps_refclk) {
193 printk(error, 4, status);
194 return -ENODEV;
195 }
196 refclk_psec = ps_refclk;
197 status = tusb6010_platform_retime(1);
198 if (status < 0) {
199 printk(error, 5, status);
200 return status;
201 }
202
203 /* finish device setup ... */
204 if (!data) {
205 printk(error, 6, status);
206 return -ENODEV;
207 }
208 tusb_device.dev.platform_data = data;
209
210 /* so far so good ... register the device */
211 status = platform_device_register(&tusb_device);
212 if (status < 0) {
213 printk(error, 7, status);
214 return status;
215 }
216 return 0;
217}