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
17 #include <asm/mach-types.h>
18 #include <asm/mach/arch.h>
19
20 #include <mach/cp_intc.h>
21 #include <mach/da8xx.h>
22 #include <mach/mux.h>
23
24 #define HAWKBOARD_PHY_ID "davinci_mdio-0:07"
25 #define DA850_HAWK_MMCSD_CD_PIN GPIO_TO_PIN(3, 12)
26 #define DA850_HAWK_MMCSD_WP_PIN GPIO_TO_PIN(3, 13)
27
28 #define DA850_USB1_VBUS_PIN GPIO_TO_PIN(2, 4)
29 #define DA850_USB1_OC_PIN GPIO_TO_PIN(6, 13)
30
31 static short omapl138_hawk_mii_pins[] __initdata = {
32 DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
33 DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
34 DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
35 DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
36 DA850_MDIO_D,
37 -1
38 };
39
omapl138_hawk_config_emac(void)40 static __init void omapl138_hawk_config_emac(void)
41 {
42 void __iomem *cfgchip3 = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
43 int ret;
44 u32 val;
45 struct davinci_soc_info *soc_info = &davinci_soc_info;
46
47 val = __raw_readl(cfgchip3);
48 val &= ~BIT(8);
49 ret = davinci_cfg_reg_list(omapl138_hawk_mii_pins);
50 if (ret) {
51 pr_warn("%s: CPGMAC/MII mux setup failed: %d\n", __func__, ret);
52 return;
53 }
54
55 /* configure the CFGCHIP3 register for MII */
56 __raw_writel(val, cfgchip3);
57 pr_info("EMAC: MII PHY configured\n");
58
59 soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
60
61 ret = da8xx_register_emac();
62 if (ret)
63 pr_warn("%s: EMAC registration failed: %d\n", __func__, ret);
64 }
65
66 /*
67 * The following EDMA channels/slots are not being used by drivers (for
68 * example: Timer, GPIO, UART events etc) on da850/omap-l138 EVM/Hawkboard,
69 * hence they are being reserved for codecs on the DSP side.
70 */
71 static const s16 da850_dma0_rsv_chans[][2] = {
72 /* (offset, number) */
73 { 8, 6},
74 {24, 4},
75 {30, 2},
76 {-1, -1}
77 };
78
79 static const s16 da850_dma0_rsv_slots[][2] = {
80 /* (offset, number) */
81 { 8, 6},
82 {24, 4},
83 {30, 50},
84 {-1, -1}
85 };
86
87 static const s16 da850_dma1_rsv_chans[][2] = {
88 /* (offset, number) */
89 { 0, 28},
90 {30, 2},
91 {-1, -1}
92 };
93
94 static const s16 da850_dma1_rsv_slots[][2] = {
95 /* (offset, number) */
96 { 0, 28},
97 {30, 90},
98 {-1, -1}
99 };
100
101 static struct edma_rsv_info da850_edma_cc0_rsv = {
102 .rsv_chans = da850_dma0_rsv_chans,
103 .rsv_slots = da850_dma0_rsv_slots,
104 };
105
106 static struct edma_rsv_info da850_edma_cc1_rsv = {
107 .rsv_chans = da850_dma1_rsv_chans,
108 .rsv_slots = da850_dma1_rsv_slots,
109 };
110
111 static struct edma_rsv_info *da850_edma_rsv[2] = {
112 &da850_edma_cc0_rsv,
113 &da850_edma_cc1_rsv,
114 };
115
116 static const short hawk_mmcsd0_pins[] = {
117 DA850_MMCSD0_DAT_0, DA850_MMCSD0_DAT_1, DA850_MMCSD0_DAT_2,
118 DA850_MMCSD0_DAT_3, DA850_MMCSD0_CLK, DA850_MMCSD0_CMD,
119 DA850_GPIO3_12, DA850_GPIO3_13,
120 -1
121 };
122
da850_hawk_mmc_get_ro(int index)123 static int da850_hawk_mmc_get_ro(int index)
124 {
125 return gpio_get_value(DA850_HAWK_MMCSD_WP_PIN);
126 }
127
da850_hawk_mmc_get_cd(int index)128 static int da850_hawk_mmc_get_cd(int index)
129 {
130 return !gpio_get_value(DA850_HAWK_MMCSD_CD_PIN);
131 }
132
133 static struct davinci_mmc_config da850_mmc_config = {
134 .get_ro = da850_hawk_mmc_get_ro,
135 .get_cd = da850_hawk_mmc_get_cd,
136 .wires = 4,
137 .max_freq = 50000000,
138 .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
139 };
140
omapl138_hawk_mmc_init(void)141 static __init void omapl138_hawk_mmc_init(void)
142 {
143 int ret;
144
145 ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
146 if (ret) {
147 pr_warn("%s: MMC/SD0 mux setup failed: %d\n", __func__, ret);
148 return;
149 }
150
151 ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
152 GPIOF_DIR_IN, "MMC CD");
153 if (ret < 0) {
154 pr_warn("%s: can not open GPIO %d\n",
155 __func__, DA850_HAWK_MMCSD_CD_PIN);
156 return;
157 }
158
159 ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
160 GPIOF_DIR_IN, "MMC WP");
161 if (ret < 0) {
162 pr_warn("%s: can not open GPIO %d\n",
163 __func__, DA850_HAWK_MMCSD_WP_PIN);
164 goto mmc_setup_wp_fail;
165 }
166
167 ret = da8xx_register_mmcsd0(&da850_mmc_config);
168 if (ret) {
169 pr_warn("%s: MMC/SD0 registration failed: %d\n", __func__, ret);
170 goto mmc_setup_mmcsd_fail;
171 }
172
173 return;
174
175 mmc_setup_mmcsd_fail:
176 gpio_free(DA850_HAWK_MMCSD_WP_PIN);
177 mmc_setup_wp_fail:
178 gpio_free(DA850_HAWK_MMCSD_CD_PIN);
179 }
180
181 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
182 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
183
184 static const short da850_hawk_usb11_pins[] = {
185 DA850_GPIO2_4, DA850_GPIO6_13,
186 -1
187 };
188
hawk_usb_set_power(unsigned port,int on)189 static int hawk_usb_set_power(unsigned port, int on)
190 {
191 gpio_set_value(DA850_USB1_VBUS_PIN, on);
192 return 0;
193 }
194
hawk_usb_get_power(unsigned port)195 static int hawk_usb_get_power(unsigned port)
196 {
197 return gpio_get_value(DA850_USB1_VBUS_PIN);
198 }
199
hawk_usb_get_oci(unsigned port)200 static int hawk_usb_get_oci(unsigned port)
201 {
202 return !gpio_get_value(DA850_USB1_OC_PIN);
203 }
204
hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)205 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
206 {
207 int irq = gpio_to_irq(DA850_USB1_OC_PIN);
208 int error = 0;
209
210 if (handler != NULL) {
211 hawk_usb_ocic_handler = handler;
212
213 error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
214 IRQF_DISABLED | IRQF_TRIGGER_RISING |
215 IRQF_TRIGGER_FALLING,
216 "OHCI over-current indicator", NULL);
217 if (error)
218 pr_err("%s: could not request IRQ to watch "
219 "over-current indicator changes\n", __func__);
220 } else {
221 free_irq(irq, NULL);
222 }
223 return error;
224 }
225
226 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
227 .set_power = hawk_usb_set_power,
228 .get_power = hawk_usb_get_power,
229 .get_oci = hawk_usb_get_oci,
230 .ocic_notify = hawk_usb_ocic_notify,
231 /* TPS2087 switch @ 5V */
232 .potpgt = (3 + 1) / 2, /* 3 ms max */
233 };
234
omapl138_hawk_usb_ocic_irq(int irq,void * dev_id)235 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
236 {
237 hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
238 return IRQ_HANDLED;
239 }
240
omapl138_hawk_usb_init(void)241 static __init void omapl138_hawk_usb_init(void)
242 {
243 int ret;
244 u32 cfgchip2;
245
246 ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
247 if (ret) {
248 pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
249 return;
250 }
251
252 /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
253
254 cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
255 cfgchip2 &= ~CFGCHIP2_REFFREQ;
256 cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ;
257 __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
258
259 ret = gpio_request_one(DA850_USB1_VBUS_PIN,
260 GPIOF_DIR_OUT, "USB1 VBUS");
261 if (ret < 0) {
262 pr_err("%s: failed to request GPIO for USB 1.1 port "
263 "power control: %d\n", __func__, ret);
264 return;
265 }
266
267 ret = gpio_request_one(DA850_USB1_OC_PIN,
268 GPIOF_DIR_IN, "USB1 OC");
269 if (ret < 0) {
270 pr_err("%s: failed to request GPIO for USB 1.1 port "
271 "over-current indicator: %d\n", __func__, ret);
272 goto usb11_setup_oc_fail;
273 }
274
275 ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
276 if (ret) {
277 pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
278 goto usb11_setup_fail;
279 }
280
281 return;
282
283 usb11_setup_fail:
284 gpio_free(DA850_USB1_OC_PIN);
285 usb11_setup_oc_fail:
286 gpio_free(DA850_USB1_VBUS_PIN);
287 }
288
289 static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
290 .enabled_uarts = 0x7,
291 };
292
omapl138_hawk_init(void)293 static __init void omapl138_hawk_init(void)
294 {
295 int ret;
296
297 davinci_serial_init(&omapl138_hawk_uart_config);
298
299 omapl138_hawk_config_emac();
300
301 ret = da850_register_edma(da850_edma_rsv);
302 if (ret)
303 pr_warn("%s: EDMA registration failed: %d\n", __func__, ret);
304
305 omapl138_hawk_mmc_init();
306
307 omapl138_hawk_usb_init();
308
309 ret = da8xx_register_watchdog();
310 if (ret)
311 pr_warn("%s: watchdog registration failed: %d\n",
312 __func__, ret);
313
314 ret = da8xx_register_rproc();
315 if (ret)
316 pr_warn("%s: dsp/rproc registration failed: %d\n",
317 __func__, ret);
318 }
319
320 #ifdef CONFIG_SERIAL_8250_CONSOLE
omapl138_hawk_console_init(void)321 static int __init omapl138_hawk_console_init(void)
322 {
323 if (!machine_is_omapl138_hawkboard())
324 return 0;
325
326 return add_preferred_console("ttyS", 2, "115200");
327 }
328 console_initcall(omapl138_hawk_console_init);
329 #endif
330
omapl138_hawk_map_io(void)331 static void __init omapl138_hawk_map_io(void)
332 {
333 da850_init();
334 }
335
336 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
337 .atag_offset = 0x100,
338 .map_io = omapl138_hawk_map_io,
339 .init_irq = cp_intc_init,
340 .init_time = davinci_timer_init,
341 .init_machine = omapl138_hawk_init,
342 .init_late = davinci_init_late,
343 .dma_zone_size = SZ_128M,
344 .restart = da8xx_restart,
345 .reserve = da8xx_rproc_reserve_cma,
346 MACHINE_END
347