1 /*
2 * Hawkboard.org based on TI's OMAP-L138 Platform
3 *
4 * Initial code: Syed Mohammed Khasim
5 *
6 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com
7 *
8 * This file is licensed under the terms of the GNU General Public License
9 * version 2. This program is licensed "as is" without any warranty of
10 * any kind, whether express or implied.
11 */
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/console.h>
15 #include <linux/gpio.h>
16 #include <linux/platform_data/gpio-davinci.h>
17
18 #include <asm/mach-types.h>
19 #include <asm/mach/arch.h>
20
21 #include <mach/common.h>
22 #include "cp_intc.h"
23 #include <mach/da8xx.h>
24 #include <mach/mux.h>
25
26 #define HAWKBOARD_PHY_ID "davinci_mdio-0:07"
27 #define DA850_HAWK_MMCSD_CD_PIN GPIO_TO_PIN(3, 12)
28 #define DA850_HAWK_MMCSD_WP_PIN GPIO_TO_PIN(3, 13)
29
30 #define DA850_USB1_VBUS_PIN GPIO_TO_PIN(2, 4)
31 #define DA850_USB1_OC_PIN GPIO_TO_PIN(6, 13)
32
33 static short omapl138_hawk_mii_pins[] __initdata = {
34 DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
35 DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
36 DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
37 DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
38 DA850_MDIO_D,
39 -1
40 };
41
omapl138_hawk_config_emac(void)42 static __init void omapl138_hawk_config_emac(void)
43 {
44 void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
45 int ret;
46 u32 val;
47 struct davinci_soc_info *soc_info = &davinci_soc_info;
48
49 val = __raw_readl(cfgchip3);
50 val &= ~BIT(8);
51 ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
52 if (ret) {
53 pr_warn("%s: CPGMAC/MII mux setup failed: %d\n", __func__, ret);
54 return;
55 }
56
57 /* configure the CFGCHIP3 register for MII */
58 __raw_writel(val, cfgchip3);
59 pr_info("EMAC: MII PHY configured\n");
60
61 soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
62
63 ret = da8xx_register_emac();
64 if (ret)
65 pr_warn("%s: EMAC registration failed: %d\n", __func__, ret);
66 }
67
68 /*
69 * The following EDMA channels/slots are not being used by drivers (for
70 * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
71 * hence they are being reserved for codecs on the DSP side.
72 */
73 static const s16 da850_dma0_rsv_chans[][2] = {
74 /* (offset, number) */
75 { 8, 6},
76 {24, 4},
77 {30, 2},
78 {-1, -1}
79 };
80
81 static const s16 da850_dma0_rsv_slots[][2] = {
82 /* (offset, number) */
83 { 8, 6},
84 {24, 4},
85 {30, 50},
86 {-1, -1}
87 };
88
89 static const s16 da850_dma1_rsv_chans[][2] = {
90 /* (offset, number) */
91 { 0, 28},
92 {30, 2},
93 {-1, -1}
94 };
95
96 static const s16 da850_dma1_rsv_slots[][2] = {
97 /* (offset, number) */
98 { 0, 28},
99 {30, 90},
100 {-1, -1}
101 };
102
103 static struct edma_rsv_info da850_edma_cc0_rsv = {
104 .rsv_chans = da850_dma0_rsv_chans,
105 .rsv_slots = da850_dma0_rsv_slots,
106 };
107
108 static struct edma_rsv_info da850_edma_cc1_rsv = {
109 .rsv_chans = da850_dma1_rsv_chans,
110 .rsv_slots = da850_dma1_rsv_slots,
111 };
112
113 static struct edma_rsv_info *da850_edma_rsv[2] = {
114 &da850_edma_cc0_rsv,
115 &da850_edma_cc1_rsv,
116 };
117
118 static const short hawk_mmcsd0_pins[] = {
119 DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
120 DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
121 DA850_GPIO3_12, DA850_GPIO3_13,
122 -1
123 };
124
da850_hawk_mmc_get_ro(int index)125 static int da850_hawk_mmc_get_ro(int index)
126 {
127 return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
128 }
129
da850_hawk_mmc_get_cd(int index)130 static int da850_hawk_mmc_get_cd(int index)
131 {
132 return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
133 }
134
135 static struct davinci_mmc_config da850_mmc_config = {
136 .get_ro = da850_hawk_mmc_get_ro,
137 .get_cd = da850_hawk_mmc_get_cd,
138 .wires = 4,
139 .max_freq = 50000000,
140 .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
141 };
142
omapl138_hawk_mmc_init(void)143 static __init void omapl138_hawk_mmc_init(void)
144 {
145 int ret;
146
147 ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
148 if (ret) {
149 pr_warn("%s: MMC/SD0 mux setup failed: %d\n", __func__, ret);
150 return;
151 }
152
153 ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
154 GPIOF_DIR_IN, "MMC CD");
155 if (ret < 0) {
156 pr_warn("%s: can not open GPIO %d\n",
157 __func__, DA850_HAWK_MMCSD_CD_PIN);
158 return;
159 }
160
161 ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
162 GPIOF_DIR_IN, "MMC WP");
163 if (ret < 0) {
164 pr_warn("%s: can not open GPIO %d\n",
165 __func__, DA850_HAWK_MMCSD_WP_PIN);
166 goto mmc_setup_wp_fail;
167 }
168
169 ret = da8xx_register_mmcsd0(&da850_mmc_config);
170 if (ret) {
171 pr_warn("%s: MMC/SD0 registration failed: %d\n", __func__, ret);
172 goto mmc_setup_mmcsd_fail;
173 }
174
175 return;
176
177 mmc_setup_mmcsd_fail:
178 gpio_free(DA850_HAWK_MMCSD_WP_PIN);
179 mmc_setup_wp_fail:
180 gpio_free(DA850_HAWK_MMCSD_CD_PIN);
181 }
182
183 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
184 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
185
186 static const short da850_hawk_usb11_pins[] = {
187 DA850_GPIO2_4, DA850_GPIO6_13,
188 -1
189 };
190
hawk_usb_set_power(unsigned port,int on)191 static int hawk_usb_set_power(unsigned port, int on)
192 {
193 gpio_set_value(DA850_USB1_VBUS_PIN, on);
194 return 0;
195 }
196
hawk_usb_get_power(unsigned port)197 static int hawk_usb_get_power(unsigned port)
198 {
199 return gpio_get_value(DA850_USB1_VBUS_PIN);
200 }
201
hawk_usb_get_oci(unsigned port)202 static int hawk_usb_get_oci(unsigned port)
203 {
204 return !gpio_get_value(DA850_USB1_OC_PIN);
205 }
206
hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)207 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
208 {
209 int irq = gpio_to_irq(DA850_USB1_OC_PIN);
210 int error = 0;
211
212 if (handler != NULL) {
213 hawk_usb_ocic_handler = handler;
214
215 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
216 IRQF_TRIGGER_RISING |
217 IRQF_TRIGGER_FALLING,
218 "OHCI over-current indicator", NULL);
219 if (error)
220 pr_err("%s: could not request IRQ to watch "
221 "over-current indicator changes\n", __func__);
222 } else {
223 free_irq(irq, NULL);
224 }
225 return error;
226 }
227
228 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
229 .set_power = hawk_usb_set_power,
230 .get_power = hawk_usb_get_power,
231 .get_oci = hawk_usb_get_oci,
232 .ocic_notify = hawk_usb_ocic_notify,
233 /* TPS2087 switch @ 5V */
234 .potpgt = (3 + 1) / 2, /* 3 ms max */
235 };
236
omapl138_hawk_usb_ocic_irq(int irq,void * dev_id)237 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
238 {
239 hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
240 return IRQ_HANDLED;
241 }
242
omapl138_hawk_usb_init(void)243 static __init void omapl138_hawk_usb_init(void)
244 {
245 int ret;
246 u32 cfgchip2;
247
248 ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
249 if (ret) {
250 pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
251 return;
252 }
253
254 /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
255
256 cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
257 cfgchip2 &= ~CFGCHIP2_REFFREQ;
258 cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ;
259 __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
260
261 ret = gpio_request_one(DA850_USB1_VBUS_PIN,
262 GPIOF_DIR_OUT, "USB1 VBUS");
263 if (ret < 0) {
264 pr_err("%s: failed to request GPIO for USB 1.1 port "
265 "power control: %d\n", __func__, ret);
266 return;
267 }
268
269 ret = gpio_request_one(DA850_USB1_OC_PIN,
270 GPIOF_DIR_IN, "USB1 OC");
271 if (ret < 0) {
272 pr_err("%s: failed to request GPIO for USB 1.1 port "
273 "over-current indicator: %d\n", __func__, ret);
274 goto usb11_setup_oc_fail;
275 }
276
277 ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
278 if (ret) {
279 pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
280 goto usb11_setup_fail;
281 }
282
283 return;
284
285 usb11_setup_fail:
286 gpio_free(DA850_USB1_OC_PIN);
287 usb11_setup_oc_fail:
288 gpio_free(DA850_USB1_VBUS_PIN);
289 }
290
omapl138_hawk_init(void)291 static __init void omapl138_hawk_init(void)
292 {
293 int ret;
294
295 ret = da850_register_gpio();
296 if (ret)
297 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
298
299 davinci_serial_init(da8xx_serial_device);
300
301 omapl138_hawk_config_emac();
302
303 ret = da850_register_edma(da850_edma_rsv);
304 if (ret)
305 pr_warn("%s: EDMA registration failed: %d\n", __func__, ret);
306
307 omapl138_hawk_mmc_init();
308
309 omapl138_hawk_usb_init();
310
311 ret = da8xx_register_watchdog();
312 if (ret)
313 pr_warn("%s: watchdog registration failed: %d\n",
314 __func__, ret);
315
316 ret = da8xx_register_rproc();
317 if (ret)
318 pr_warn("%s: dsp/rproc registration failed: %d\n",
319 __func__, ret);
320 }
321
322 #ifdef CONFIG_SERIAL_8250_CONSOLE
omapl138_hawk_console_init(void)323 static int __init omapl138_hawk_console_init(void)
324 {
325 if (!machine_is_omapl138_hawkboard())
326 return 0;
327
328 return add_preferred_console("ttyS", 2, "115200");
329 }
330 console_initcall(omapl138_hawk_console_init);
331 #endif
332
omapl138_hawk_map_io(void)333 static void __init omapl138_hawk_map_io(void)
334 {
335 da850_init();
336 }
337
338 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
339 .atag_offset = 0x100,
340 .map_io = omapl138_hawk_map_io,
341 .init_irq = cp_intc_init,
342 .init_time = davinci_timer_init,
343 .init_machine = omapl138_hawk_init,
344 .init_late = davinci_init_late,
345 .dma_zone_size = SZ_128M,
346 .restart = da8xx_restart,
347 .reserve = da8xx_rproc_reserve_cma,
348 MACHINE_END
349