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_warning("%s: cpgmac/mii mux setup failed: %d\n",
52 			__func__, ret);
53 		return;
54 	}
55 
56 	/* configure the CFGCHIP3 register for MII */
57 	__raw_writel(val, cfgchip3);
58 	pr_info("EMAC: MII PHY configured\n");
59 
60 	soc_info->emac_pdata->phy_id = HAWKBOARD_PHY_ID;
61 
62 	ret = da8xx_register_emac();
63 	if (ret)
64 		pr_warning("%s: emac registration failed: %d\n",
65 			__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 	.version	= MMC_CTLR_VERSION_2,
142 };
143 
omapl138_hawk_mmc_init(void)144 static __init void omapl138_hawk_mmc_init(void)
145 {
146 	int ret;
147 
148 	ret = davinci_cfg_reg_list(hawk_mmcsd0_pins);
149 	if (ret) {
150 		pr_warning("%s: MMC/SD0 mux setup failed: %d\n",
151 			__func__, ret);
152 		return;
153 	}
154 
155 	ret = gpio_request_one(DA850_HAWK_MMCSD_CD_PIN,
156 			GPIOF_DIR_IN, "MMC CD");
157 	if (ret < 0) {
158 		pr_warning("%s: can not open GPIO %d\n",
159 			__func__, DA850_HAWK_MMCSD_CD_PIN);
160 		return;
161 	}
162 
163 	ret = gpio_request_one(DA850_HAWK_MMCSD_WP_PIN,
164 			GPIOF_DIR_IN, "MMC WP");
165 	if (ret < 0) {
166 		pr_warning("%s: can not open GPIO %d\n",
167 			__func__, DA850_HAWK_MMCSD_WP_PIN);
168 		goto mmc_setup_wp_fail;
169 	}
170 
171 	ret = da8xx_register_mmcsd0(&da850_mmc_config);
172 	if (ret) {
173 		pr_warning("%s: MMC/SD0 registration failed: %d\n",
174 			__func__, ret);
175 		goto mmc_setup_mmcsd_fail;
176 	}
177 
178 	return;
179 
180 mmc_setup_mmcsd_fail:
181 	gpio_free(DA850_HAWK_MMCSD_WP_PIN);
182 mmc_setup_wp_fail:
183 	gpio_free(DA850_HAWK_MMCSD_CD_PIN);
184 }
185 
186 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
187 static da8xx_ocic_handler_t hawk_usb_ocic_handler;
188 
189 static const short da850_hawk_usb11_pins[] = {
190 	DA850_GPIO2_4, DA850_GPIO6_13,
191 	-1
192 };
193 
hawk_usb_set_power(unsigned port,int on)194 static int hawk_usb_set_power(unsigned port, int on)
195 {
196 	gpio_set_value(DA850_USB1_VBUS_PIN, on);
197 	return 0;
198 }
199 
hawk_usb_get_power(unsigned port)200 static int hawk_usb_get_power(unsigned port)
201 {
202 	return gpio_get_value(DA850_USB1_VBUS_PIN);
203 }
204 
hawk_usb_get_oci(unsigned port)205 static int hawk_usb_get_oci(unsigned port)
206 {
207 	return !gpio_get_value(DA850_USB1_OC_PIN);
208 }
209 
hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)210 static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
211 {
212 	int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
213 	int error       = 0;
214 
215 	if (handler != NULL) {
216 		hawk_usb_ocic_handler = handler;
217 
218 		error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
219 					IRQF_DISABLED | IRQF_TRIGGER_RISING |
220 					IRQF_TRIGGER_FALLING,
221 					"OHCI over-current indicator", NULL);
222 		if (error)
223 			pr_err("%s: could not request IRQ to watch "
224 				"over-current indicator changes\n", __func__);
225 	} else {
226 		free_irq(irq, NULL);
227 	}
228 	return error;
229 }
230 
231 static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
232 	.set_power      = hawk_usb_set_power,
233 	.get_power      = hawk_usb_get_power,
234 	.get_oci        = hawk_usb_get_oci,
235 	.ocic_notify    = hawk_usb_ocic_notify,
236 	/* TPS2087 switch @ 5V */
237 	.potpgt         = (3 + 1) / 2,  /* 3 ms max */
238 };
239 
omapl138_hawk_usb_ocic_irq(int irq,void * dev_id)240 static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
241 {
242 	hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
243 	return IRQ_HANDLED;
244 }
245 
omapl138_hawk_usb_init(void)246 static __init void omapl138_hawk_usb_init(void)
247 {
248 	int ret;
249 	u32 cfgchip2;
250 
251 	ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
252 	if (ret) {
253 		pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
254 			__func__, ret);
255 		return;
256 	}
257 
258 	/* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
259 
260 	cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
261 	cfgchip2 &= ~CFGCHIP2_REFFREQ;
262 	cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
263 	__raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
264 
265 	ret = gpio_request_one(DA850_USB1_VBUS_PIN,
266 			GPIOF_DIR_OUT, "USB1 VBUS");
267 	if (ret < 0) {
268 		pr_err("%s: failed to request GPIO for USB 1.1 port "
269 			"power control: %d\n", __func__, ret);
270 		return;
271 	}
272 
273 	ret = gpio_request_one(DA850_USB1_OC_PIN,
274 			GPIOF_DIR_IN, "USB1 OC");
275 	if (ret < 0) {
276 		pr_err("%s: failed to request GPIO for USB 1.1 port "
277 			"over-current indicator: %d\n", __func__, ret);
278 		goto usb11_setup_oc_fail;
279 	}
280 
281 	ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
282 	if (ret) {
283 		pr_warning("%s: USB 1.1 registration failed: %d\n",
284 			__func__, ret);
285 		goto usb11_setup_fail;
286 	}
287 
288 	return;
289 
290 usb11_setup_fail:
291 	gpio_free(DA850_USB1_OC_PIN);
292 usb11_setup_oc_fail:
293 	gpio_free(DA850_USB1_VBUS_PIN);
294 }
295 
296 static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
297 	.enabled_uarts = 0x7,
298 };
299 
omapl138_hawk_init(void)300 static __init void omapl138_hawk_init(void)
301 {
302 	int ret;
303 
304 	davinci_serial_init(&omapl138_hawk_uart_config);
305 
306 	omapl138_hawk_config_emac();
307 
308 	ret = da850_register_edma(da850_edma_rsv);
309 	if (ret)
310 		pr_warning("%s: EDMA registration failed: %d\n",
311 			__func__, ret);
312 
313 	omapl138_hawk_mmc_init();
314 
315 	omapl138_hawk_usb_init();
316 
317 	ret = da8xx_register_watchdog();
318 	if (ret)
319 		pr_warning("omapl138_hawk_init: "
320 			"watchdog registration failed: %d\n",
321 			ret);
322 }
323 
324 #ifdef CONFIG_SERIAL_8250_CONSOLE
omapl138_hawk_console_init(void)325 static int __init omapl138_hawk_console_init(void)
326 {
327 	if (!machine_is_omapl138_hawkboard())
328 		return 0;
329 
330 	return add_preferred_console("ttyS", 2, "115200");
331 }
332 console_initcall(omapl138_hawk_console_init);
333 #endif
334 
omapl138_hawk_map_io(void)335 static void __init omapl138_hawk_map_io(void)
336 {
337 	da850_init();
338 }
339 
340 MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard")
341 	.atag_offset	= 0x100,
342 	.map_io		= omapl138_hawk_map_io,
343 	.init_irq	= cp_intc_init,
344 	.timer		= &davinci_timer,
345 	.init_machine	= omapl138_hawk_init,
346 	.dma_zone_size	= SZ_128M,
347 	.restart	= da8xx_restart,
348 MACHINE_END
349