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/interrupt.h>
16 #include <linux/gpio.h>
17 #include <linux/gpio/machine.h>
18 #include <linux/platform_data/gpio-davinci.h>
19 #include <linux/regulator/machine.h>
20
21 #include <asm/mach-types.h>
22 #include <asm/mach/arch.h>
23
24 #include <mach/common.h>
25 #include "cp_intc.h"
26 #include <mach/da8xx.h>
27 #include <mach/mux.h>
28
29 #define HAWKBOARD_PHY_ID "davinci_mdio-0:07"
30
31 #define DA850_USB1_VBUS_PIN GPIO_TO_PIN(2, 4)
32 #define DA850_USB1_OC_PIN GPIO_TO_PIN(6, 13)
33
34 static short omapl138_hawk_mii_pins[] __initdata = {
35 DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
36 DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
37 DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
38 DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
39 DA850_MDIO_D,
40 -1
41 };
42
omapl138_hawk_config_emac(void)43 static __init void omapl138_hawk_config_emac(void)
44 {
45 void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
46 int ret;
47 u32 val;
48 struct davinci_soc_info *soc_info = &davinci_soc_info;
49
50 val = __raw_readl(cfgchip3);
51 val &= ~BIT(8);
52 ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
53 if (ret) {
54 pr_warn("%s: CPGMAC/MII mux setup failed: %d\n", __func__, ret);
55 return;
56 }
57
58 /* configure the CFGCHIP3 register for MII */
59 __raw_writel(val, cfgchip3);
60 pr_info("EMAC: MII PHY configured\n");
61
62 soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
63
64 ret = da8xx_register_emac();
65 if (ret)
66 pr_warn("%s: EMAC registration failed: %d\n", __func__, ret);
67 }
68
69 /*
70 * The following EDMA channels/slots are not being used by drivers (for
71 * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
72 * hence they are being reserved for codecs on the DSP side.
73 */
74 static const s16 da850_dma0_rsv_chans[][2] = {
75 /* (offset, number) */
76 { 8, 6},
77 {24, 4},
78 {30, 2},
79 {-1, -1}
80 };
81
82 static const s16 da850_dma0_rsv_slots[][2] = {
83 /* (offset, number) */
84 { 8, 6},
85 {24, 4},
86 {30, 50},
87 {-1, -1}
88 };
89
90 static const s16 da850_dma1_rsv_chans[][2] = {
91 /* (offset, number) */
92 { 0, 28},
93 {30, 2},
94 {-1, -1}
95 };
96
97 static const s16 da850_dma1_rsv_slots[][2] = {
98 /* (offset, number) */
99 { 0, 28},
100 {30, 90},
101 {-1, -1}
102 };
103
104 static struct edma_rsv_info da850_edma_cc0_rsv = {
105 .rsv_chans = da850_dma0_rsv_chans,
106 .rsv_slots = da850_dma0_rsv_slots,
107 };
108
109 static struct edma_rsv_info da850_edma_cc1_rsv = {
110 .rsv_chans = da850_dma1_rsv_chans,
111 .rsv_slots = da850_dma1_rsv_slots,
112 };
113
114 static struct edma_rsv_info *da850_edma_rsv[2] = {
115 &da850_edma_cc0_rsv,
116 &da850_edma_cc1_rsv,
117 };
118
119 static const short hawk_mmcsd0_pins[] = {
120 DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
121 DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
122 DA850_GPIO3_12, DA850_GPIO3_13,
123 -1
124 };
125
126 #define DA850_HAWK_MMCSD_CD_PIN GPIO_TO_PIN(3, 12)
127 #define DA850_HAWK_MMCSD_WP_PIN GPIO_TO_PIN(3, 13)
128
129 static struct gpiod_lookup_table mmc_gpios_table = {
130 .dev_id = "da830-mmc.0",
131 .table = {
132 GPIO_LOOKUP("davinci_gpio.0", DA850_HAWK_MMCSD_CD_PIN, "cd",
133 GPIO_ACTIVE_LOW),
134 GPIO_LOOKUP("davinci_gpio.0", DA850_HAWK_MMCSD_WP_PIN, "wp",
135 GPIO_ACTIVE_LOW),
136 },
137 };
138
139 static struct davinci_mmc_config da850_mmc_config = {
140 .wires = 4,
141 .max_freq = 50000000,
142 .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
143 };
144
omapl138_hawk_mmc_init(void)145 static __init void omapl138_hawk_mmc_init(void)
146 {
147 int ret;
148
149 ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
150 if (ret) {
151 pr_warn("%s: MMC/SD0 mux setup failed: %d\n", __func__, ret);
152 return;
153 }
154
155 gpiod_add_lookup_table(&mmc_gpios_table);
156
157 ret = da8xx_register_mmcsd0(&da850_mmc_config);
158 if (ret) {
159 pr_warn("%s: MMC/SD0 registration failed: %d\n", __func__, ret);
160 goto mmc_setup_mmcsd_fail;
161 }
162
163 return;
164
165 mmc_setup_mmcsd_fail:
166 gpiod_remove_lookup_table(&mmc_gpios_table);
167 }
168
169 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
170 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
171
172 static const short da850_hawk_usb11_pins[] = {
173 DA850_GPIO2_4, DA850_GPIO6_13,
174 -1
175 };
176
hawk_usb_set_power(unsigned port,int on)177 static int hawk_usb_set_power(unsigned port, int on)
178 {
179 gpio_set_value(DA850_USB1_VBUS_PIN, on);
180 return 0;
181 }
182
hawk_usb_get_power(unsigned port)183 static int hawk_usb_get_power(unsigned port)
184 {
185 return gpio_get_value(DA850_USB1_VBUS_PIN);
186 }
187
hawk_usb_get_oci(unsigned port)188 static int hawk_usb_get_oci(unsigned port)
189 {
190 return !gpio_get_value(DA850_USB1_OC_PIN);
191 }
192
hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)193 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
194 {
195 int irq = gpio_to_irq(DA850_USB1_OC_PIN);
196 int error = 0;
197
198 if (handler != NULL) {
199 hawk_usb_ocic_handler = handler;
200
201 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
202 IRQF_TRIGGER_RISING |
203 IRQF_TRIGGER_FALLING,
204 "OHCI over-current indicator", NULL);
205 if (error)
206 pr_err("%s: could not request IRQ to watch "
207 "over-current indicator changes\n", __func__);
208 } else {
209 free_irq(irq, NULL);
210 }
211 return error;
212 }
213
214 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
215 .set_power = hawk_usb_set_power,
216 .get_power = hawk_usb_get_power,
217 .get_oci = hawk_usb_get_oci,
218 .ocic_notify = hawk_usb_ocic_notify,
219 /* TPS2087 switch @ 5V */
220 .potpgt = (3 + 1) / 2, /* 3 ms max */
221 };
222
omapl138_hawk_usb_ocic_irq(int irq,void * dev_id)223 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
224 {
225 hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
226 return IRQ_HANDLED;
227 }
228
omapl138_hawk_usb_init(void)229 static __init void omapl138_hawk_usb_init(void)
230 {
231 int ret;
232
233 ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
234 if (ret) {
235 pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
236 return;
237 }
238
239 ret = da8xx_register_usb20_phy_clk(false);
240 if (ret)
241 pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n",
242 __func__, ret);
243
244 ret = da8xx_register_usb11_phy_clk(false);
245 if (ret)
246 pr_warn("%s: USB 1.1 PHY CLK registration failed: %d\n",
247 __func__, ret);
248
249 ret = da8xx_register_usb_phy();
250 if (ret)
251 pr_warn("%s: USB PHY registration failed: %d\n",
252 __func__, ret);
253
254 ret = gpio_request_one(DA850_USB1_VBUS_PIN,
255 GPIOF_DIR_OUT, "USB1 VBUS");
256 if (ret < 0) {
257 pr_err("%s: failed to request GPIO for USB 1.1 port "
258 "power control: %d\n", __func__, ret);
259 return;
260 }
261
262 ret = gpio_request_one(DA850_USB1_OC_PIN,
263 GPIOF_DIR_IN, "USB1 OC");
264 if (ret < 0) {
265 pr_err("%s: failed to request GPIO for USB 1.1 port "
266 "over-current indicator: %d\n", __func__, ret);
267 goto usb11_setup_oc_fail;
268 }
269
270 ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
271 if (ret) {
272 pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
273 goto usb11_setup_fail;
274 }
275
276 return;
277
278 usb11_setup_fail:
279 gpio_free(DA850_USB1_OC_PIN);
280 usb11_setup_oc_fail:
281 gpio_free(DA850_USB1_VBUS_PIN);
282 }
283
omapl138_hawk_init(void)284 static __init void omapl138_hawk_init(void)
285 {
286 int ret;
287
288 ret = da8xx_register_cfgchip();
289 if (ret)
290 pr_warn("%s: CFGCHIP registration failed: %d\n", __func__, ret);
291
292 ret = da850_register_gpio();
293 if (ret)
294 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
295
296 davinci_serial_init(da8xx_serial_device);
297
298 omapl138_hawk_config_emac();
299
300 ret = da850_register_edma(da850_edma_rsv);
301 if (ret)
302 pr_warn("%s: EDMA registration failed: %d\n", __func__, ret);
303
304 omapl138_hawk_mmc_init();
305
306 omapl138_hawk_usb_init();
307
308 ret = da8xx_register_watchdog();
309 if (ret)
310 pr_warn("%s: watchdog registration failed: %d\n",
311 __func__, ret);
312
313 ret = da8xx_register_rproc();
314 if (ret)
315 pr_warn("%s: dsp/rproc registration failed: %d\n",
316 __func__, ret);
317
318 regulator_has_full_constraints();
319 }
320
321 #ifdef CONFIG_SERIAL_8250_CONSOLE
omapl138_hawk_console_init(void)322 static int __init omapl138_hawk_console_init(void)
323 {
324 if (!machine_is_omapl138_hawkboard())
325 return 0;
326
327 return add_preferred_console("ttyS", 2, "115200");
328 }
329 console_initcall(omapl138_hawk_console_init);
330 #endif
331
omapl138_hawk_map_io(void)332 static void __init omapl138_hawk_map_io(void)
333 {
334 da850_init();
335 }
336
337 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
338 .atag_offset = 0x100,
339 .map_io = omapl138_hawk_map_io,
340 .init_irq = cp_intc_init,
341 .init_time = davinci_timer_init,
342 .init_machine = omapl138_hawk_init,
343 .init_late = davinci_init_late,
344 .dma_zone_size = SZ_128M,
345 .restart = da8xx_restart,
346 .reserve = da8xx_rproc_reserve_cma,
347 MACHINE_END
348