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 #include <linux/platform_data/usb-omap.h> 19 20 #include <linux/usb/musb.h> 21 22 #include "gpmc.h" 23 24 #include "mux.h" 25 26 static u8 async_cs, sync_cs; 27 static unsigned refclk_psec; 28 29 30 /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */ 31 32 static int tusb_set_async_mode(unsigned sysclk_ps) 33 { 34 struct gpmc_device_timings dev_t; 35 struct gpmc_timings t; 36 unsigned t_acsnh_advnh = sysclk_ps + 3000; 37 38 memset(&dev_t, 0, sizeof(dev_t)); 39 40 dev_t.mux = true; 41 42 dev_t.t_ceasu = 8 * 1000; 43 dev_t.t_avdasu = t_acsnh_advnh - 7000; 44 dev_t.t_ce_avd = 1000; 45 dev_t.t_avdp_r = t_acsnh_advnh; 46 dev_t.t_oeasu = t_acsnh_advnh + 1000; 47 dev_t.t_oe = 300; 48 dev_t.t_cez_r = 7000; 49 dev_t.t_cez_w = dev_t.t_cez_r; 50 dev_t.t_avdp_w = t_acsnh_advnh; 51 dev_t.t_weasu = t_acsnh_advnh + 1000; 52 dev_t.t_wpl = 300; 53 dev_t.cyc_aavdh_we = 1; 54 55 gpmc_calc_timings(&t, &dev_t); 56 57 return gpmc_cs_set_timings(async_cs, &t); 58 } 59 60 static int tusb_set_sync_mode(unsigned sysclk_ps) 61 { 62 struct gpmc_device_timings dev_t; 63 struct gpmc_timings t; 64 unsigned t_scsnh_advnh = sysclk_ps + 3000; 65 66 memset(&dev_t, 0, sizeof(dev_t)); 67 68 dev_t.mux = true; 69 dev_t.sync_read = true; 70 dev_t.sync_write = true; 71 72 dev_t.clk = 11100; 73 dev_t.t_bacc = 1000; 74 dev_t.t_ces = 1000; 75 dev_t.t_ceasu = 8 * 1000; 76 dev_t.t_avdasu = t_scsnh_advnh - 7000; 77 dev_t.t_ce_avd = 1000; 78 dev_t.t_avdp_r = t_scsnh_advnh; 79 dev_t.cyc_aavdh_oe = 3; 80 dev_t.cyc_oe = 5; 81 dev_t.t_ce_rdyz = 7000; 82 dev_t.t_avdp_w = t_scsnh_advnh; 83 dev_t.cyc_aavdh_we = 3; 84 dev_t.cyc_wpl = 6; 85 dev_t.t_ce_rdyz = 7000; 86 87 gpmc_calc_timings(&t, &dev_t); 88 89 return gpmc_cs_set_timings(sync_cs, &t); 90 } 91 92 /* tusb driver calls this when it changes the chip's clocking */ 93 int tusb6010_platform_retime(unsigned is_refclk) 94 { 95 static const char error[] = 96 KERN_ERR "tusb6010 %s retime error %d\n"; 97 98 unsigned sysclk_ps; 99 int status; 100 101 if (!refclk_psec) 102 return -ENODEV; 103 104 sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60; 105 106 status = tusb_set_async_mode(sysclk_ps); 107 if (status < 0) { 108 printk(error, "async", status); 109 goto done; 110 } 111 status = tusb_set_sync_mode(sysclk_ps); 112 if (status < 0) 113 printk(error, "sync", status); 114 done: 115 return status; 116 } 117 EXPORT_SYMBOL_GPL(tusb6010_platform_retime); 118 119 static struct resource tusb_resources[] = { 120 /* Order is significant! The start/end fields 121 * are updated during setup.. 122 */ 123 { /* Asynchronous access */ 124 .flags = IORESOURCE_MEM, 125 }, 126 { /* Synchronous access */ 127 .flags = IORESOURCE_MEM, 128 }, 129 { /* IRQ */ 130 .name = "mc", 131 .flags = IORESOURCE_IRQ, 132 }, 133 }; 134 135 static u64 tusb_dmamask = ~(u32)0; 136 137 static struct platform_device tusb_device = { 138 .name = "musb-tusb", 139 .id = -1, 140 .dev = { 141 .dma_mask = &tusb_dmamask, 142 .coherent_dma_mask = 0xffffffff, 143 }, 144 .num_resources = ARRAY_SIZE(tusb_resources), 145 .resource = tusb_resources, 146 }; 147 148 149 /* this may be called only from board-*.c setup code */ 150 int __init 151 tusb6010_setup_interface(struct musb_hdrc_platform_data *data, 152 unsigned ps_refclk, unsigned waitpin, 153 unsigned async, unsigned sync, 154 unsigned irq, unsigned dmachan) 155 { 156 int status; 157 static char error[] __initdata = 158 KERN_ERR "tusb6010 init error %d, %d\n"; 159 160 /* ASYNC region, primarily for PIO */ 161 status = gpmc_cs_request(async, SZ_16M, (unsigned long *) 162 &tusb_resources[0].start); 163 if (status < 0) { 164 printk(error, 1, status); 165 return status; 166 } 167 tusb_resources[0].end = tusb_resources[0].start + 0x9ff; 168 async_cs = async; 169 gpmc_cs_write_reg(async, GPMC_CS_CONFIG1, 170 GPMC_CONFIG1_PAGE_LEN(2) 171 | GPMC_CONFIG1_WAIT_READ_MON 172 | GPMC_CONFIG1_WAIT_WRITE_MON 173 | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin) 174 | GPMC_CONFIG1_READTYPE_ASYNC 175 | GPMC_CONFIG1_WRITETYPE_ASYNC 176 | GPMC_CONFIG1_DEVICESIZE_16 177 | GPMC_CONFIG1_DEVICETYPE_NOR 178 | GPMC_CONFIG1_MUXADDDATA); 179 180 181 /* SYNC region, primarily for DMA */ 182 status = gpmc_cs_request(sync, SZ_16M, (unsigned long *) 183 &tusb_resources[1].start); 184 if (status < 0) { 185 printk(error, 2, status); 186 return status; 187 } 188 tusb_resources[1].end = tusb_resources[1].start + 0x9ff; 189 sync_cs = sync; 190 gpmc_cs_write_reg(sync, GPMC_CS_CONFIG1, 191 GPMC_CONFIG1_READMULTIPLE_SUPP 192 | GPMC_CONFIG1_READTYPE_SYNC 193 | GPMC_CONFIG1_WRITEMULTIPLE_SUPP 194 | GPMC_CONFIG1_WRITETYPE_SYNC 195 | GPMC_CONFIG1_PAGE_LEN(2) 196 | GPMC_CONFIG1_WAIT_READ_MON 197 | GPMC_CONFIG1_WAIT_WRITE_MON 198 | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin) 199 | GPMC_CONFIG1_DEVICESIZE_16 200 | GPMC_CONFIG1_DEVICETYPE_NOR 201 | GPMC_CONFIG1_MUXADDDATA 202 /* fclk divider gets set later */ 203 ); 204 205 /* IRQ */ 206 status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq"); 207 if (status < 0) { 208 printk(error, 3, status); 209 return status; 210 } 211 tusb_resources[2].start = gpio_to_irq(irq); 212 213 /* set up memory timings ... can speed them up later */ 214 if (!ps_refclk) { 215 printk(error, 4, status); 216 return -ENODEV; 217 } 218 refclk_psec = ps_refclk; 219 status = tusb6010_platform_retime(1); 220 if (status < 0) { 221 printk(error, 5, status); 222 return status; 223 } 224 225 /* finish device setup ... */ 226 if (!data) { 227 printk(error, 6, status); 228 return -ENODEV; 229 } 230 tusb_device.dev.platform_data = data; 231 232 /* REVISIT let the driver know what DMA channels work */ 233 if (!dmachan) 234 tusb_device.dev.dma_mask = NULL; 235 else { 236 /* assume OMAP 2420 ES2.0 and later */ 237 if (dmachan & (1 << 0)) 238 omap_mux_init_signal("sys_ndmareq0", 0); 239 if (dmachan & (1 << 1)) 240 omap_mux_init_signal("sys_ndmareq1", 0); 241 if (dmachan & (1 << 2)) 242 omap_mux_init_signal("sys_ndmareq2", 0); 243 if (dmachan & (1 << 3)) 244 omap_mux_init_signal("sys_ndmareq3", 0); 245 if (dmachan & (1 << 4)) 246 omap_mux_init_signal("sys_ndmareq4", 0); 247 if (dmachan & (1 << 5)) 248 omap_mux_init_signal("sys_ndmareq5", 0); 249 } 250 251 /* so far so good ... register the device */ 252 status = platform_device_register(&tusb_device); 253 if (status < 0) { 254 printk(error, 7, status); 255 return status; 256 } 257 return 0; 258 } 259