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[karo-tx-uboot.git] / board / ti / panda / panda.c
1 /*
2  * (C) Copyright 2010
3  * Texas Instruments Incorporated, <www.ti.com>
4  * Steve Sakoman  <steve@sakoman.com>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8 #include <common.h>
9 #include <asm/arch/sys_proto.h>
10 #include <asm/arch/mmc_host_def.h>
11 #include <asm/arch/clock.h>
12 #include <asm/arch/gpio.h>
13 #include <asm/gpio.h>
14
15 #include "panda_mux_data.h"
16
17 #ifdef CONFIG_USB_EHCI
18 #include <usb.h>
19 #include <asm/arch/ehci.h>
20 #include <asm/ehci-omap.h>
21 #endif
22
23 #define PANDA_ULPI_PHY_TYPE_GPIO       182
24 #define PANDA_BOARD_ID_1_GPIO          101
25 #define PANDA_ES_BOARD_ID_1_GPIO        48
26 #define PANDA_BOARD_ID_2_GPIO          171
27 #define PANDA_ES_BOARD_ID_3_GPIO         3
28 #define PANDA_ES_BOARD_ID_4_GPIO         2
29
30 DECLARE_GLOBAL_DATA_PTR;
31
32 const struct omap_sysinfo sysinfo = {
33         "Board: OMAP4 Panda\n"
34 };
35
36 struct omap4_scrm_regs *const scrm = (struct omap4_scrm_regs *)0x4a30a000;
37
38 /**
39  * @brief board_init
40  *
41  * @return 0
42  */
43 int board_init(void)
44 {
45         gpmc_init();
46
47         gd->bd->bi_arch_number = MACH_TYPE_OMAP4_PANDA;
48         gd->bd->bi_boot_params = (0x80000000 + 0x100); /* boot param addr */
49
50         return 0;
51 }
52
53 int board_eth_init(bd_t *bis)
54 {
55         return 0;
56 }
57
58 /*
59 * Routine: get_board_revision
60 * Description: Detect if we are running on a panda revision A1-A6,
61 *              or an ES panda board. This can be done by reading
62 *              the level of GPIOs and checking the processor revisions.
63 *              This should result in:
64 *                       Panda 4430:
65 *              GPIO171, GPIO101, GPIO182: 0 1 1 => A1-A5
66 *              GPIO171, GPIO101, GPIO182: 1 0 1 => A6
67 *                       Panda ES:
68 *              GPIO2, GPIO3, GPIO171, GPIO48, GPIO182: 0 0 0 1 1 => B1/B2
69 *              GPIO2, GPIO3, GPIO171, GPIO48, GPIO182: 0 0 1 1 1 => B3
70 */
71 int get_board_revision(void)
72 {
73         int board_id0, board_id1, board_id2;
74         int board_id3, board_id4;
75         int board_id;
76
77         int processor_rev = omap_revision();
78
79         /* Setup the mux for the common board ID pins (gpio 171 and 182) */
80         writew((IEN | M3), (*ctrl)->control_padconf_core_base + UNIPRO_TX0);
81         writew((IEN | M3), (*ctrl)->control_padconf_core_base + FREF_CLK2_OUT);
82
83         board_id0 = gpio_get_value(PANDA_ULPI_PHY_TYPE_GPIO);
84         board_id2 = gpio_get_value(PANDA_BOARD_ID_2_GPIO);
85
86         if ((processor_rev >= OMAP4460_ES1_0 &&
87              processor_rev <= OMAP4460_ES1_1)) {
88                 /*
89                  * Setup the mux for the ES specific board ID pins (gpio 101,
90                  * 2 and 3.
91                  */
92                 writew((IEN | M3), (*ctrl)->control_padconf_core_base +
93                                 GPMC_A24);
94                 writew((IEN | M3), (*ctrl)->control_padconf_core_base +
95                                 UNIPRO_RY0);
96                 writew((IEN | M3), (*ctrl)->control_padconf_core_base +
97                                 UNIPRO_RX1);
98
99                 board_id1 = gpio_get_value(PANDA_ES_BOARD_ID_1_GPIO);
100                 board_id3 = gpio_get_value(PANDA_ES_BOARD_ID_3_GPIO);
101                 board_id4 = gpio_get_value(PANDA_ES_BOARD_ID_4_GPIO);
102
103 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
104                 setenv("board_name", strcat(CONFIG_SYS_BOARD, "-es"));
105 #endif
106                 board_id = ((board_id4 << 4) | (board_id3 << 3) |
107                         (board_id2 << 2) | (board_id1 << 1) | (board_id0));
108         } else {
109                 /* Setup the mux for the Ax specific board ID pins (gpio 101) */
110                 writew((IEN | M3), (*ctrl)->control_padconf_core_base +
111                                 FREF_CLK2_OUT);
112
113                 board_id1 = gpio_get_value(PANDA_BOARD_ID_1_GPIO);
114                 board_id = ((board_id2 << 2) | (board_id1 << 1) | (board_id0));
115
116 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
117                 if ((board_id >= 0x3) && (processor_rev == OMAP4430_ES2_3))
118                         setenv("board_name", strcat(CONFIG_SYS_BOARD, "-a4"));
119 #endif
120         }
121
122         return board_id;
123 }
124
125 /**
126  * @brief misc_init_r - Configure Panda board specific configurations
127  * such as power configurations, ethernet initialization as phase2 of
128  * boot sequence
129  *
130  * @return 0
131  */
132 int misc_init_r(void)
133 {
134         int phy_type;
135         u32 auxclk, altclksrc;
136
137         /* EHCI is not supported on ES1.0 */
138         if (omap_revision() == OMAP4430_ES1_0)
139                 return 0;
140
141         get_board_revision();
142
143         gpio_direction_input(PANDA_ULPI_PHY_TYPE_GPIO);
144         phy_type = gpio_get_value(PANDA_ULPI_PHY_TYPE_GPIO);
145
146         if (phy_type == 1) {
147                 /* ULPI PHY supplied by auxclk3 derived from sys_clk */
148                 debug("ULPI PHY supplied by auxclk3\n");
149
150                 auxclk = readl(&scrm->auxclk3);
151                 /* Select sys_clk */
152                 auxclk &= ~AUXCLK_SRCSELECT_MASK;
153                 auxclk |=  AUXCLK_SRCSELECT_SYS_CLK << AUXCLK_SRCSELECT_SHIFT;
154                 /* Set the divisor to 2 */
155                 auxclk &= ~AUXCLK_CLKDIV_MASK;
156                 auxclk |= AUXCLK_CLKDIV_2 << AUXCLK_CLKDIV_SHIFT;
157                 /* Request auxilary clock #3 */
158                 auxclk |= AUXCLK_ENABLE_MASK;
159
160                 writel(auxclk, &scrm->auxclk3);
161         } else {
162                 /* ULPI PHY supplied by auxclk1 derived from PER dpll */
163                 debug("ULPI PHY supplied by auxclk1\n");
164
165                 auxclk = readl(&scrm->auxclk1);
166                 /* Select per DPLL */
167                 auxclk &= ~AUXCLK_SRCSELECT_MASK;
168                 auxclk |=  AUXCLK_SRCSELECT_PER_DPLL << AUXCLK_SRCSELECT_SHIFT;
169                 /* Set the divisor to 16 */
170                 auxclk &= ~AUXCLK_CLKDIV_MASK;
171                 auxclk |= AUXCLK_CLKDIV_16 << AUXCLK_CLKDIV_SHIFT;
172                 /* Request auxilary clock #3 */
173                 auxclk |= AUXCLK_ENABLE_MASK;
174
175                 writel(auxclk, &scrm->auxclk1);
176         }
177
178         altclksrc = readl(&scrm->altclksrc);
179
180         /* Activate alternate system clock supplier */
181         altclksrc &= ~ALTCLKSRC_MODE_MASK;
182         altclksrc |= ALTCLKSRC_MODE_ACTIVE;
183
184         /* enable clocks */
185         altclksrc |= ALTCLKSRC_ENABLE_INT_MASK | ALTCLKSRC_ENABLE_EXT_MASK;
186
187         writel(altclksrc, &scrm->altclksrc);
188
189         return 0;
190 }
191
192 void set_muxconf_regs_essential(void)
193 {
194         do_set_mux((*ctrl)->control_padconf_core_base,
195                    core_padconf_array_essential,
196                    sizeof(core_padconf_array_essential) /
197                    sizeof(struct pad_conf_entry));
198
199         do_set_mux((*ctrl)->control_padconf_wkup_base,
200                    wkup_padconf_array_essential,
201                    sizeof(wkup_padconf_array_essential) /
202                    sizeof(struct pad_conf_entry));
203
204         if (omap_revision() >= OMAP4460_ES1_0)
205                 do_set_mux((*ctrl)->control_padconf_wkup_base,
206                            wkup_padconf_array_essential_4460,
207                            sizeof(wkup_padconf_array_essential_4460) /
208                            sizeof(struct pad_conf_entry));
209 }
210
211 void set_muxconf_regs_non_essential(void)
212 {
213         do_set_mux((*ctrl)->control_padconf_core_base,
214                    core_padconf_array_non_essential,
215                    sizeof(core_padconf_array_non_essential) /
216                    sizeof(struct pad_conf_entry));
217
218         if (omap_revision() < OMAP4460_ES1_0)
219                 do_set_mux((*ctrl)->control_padconf_core_base,
220                            core_padconf_array_non_essential_4430,
221                            sizeof(core_padconf_array_non_essential_4430) /
222                            sizeof(struct pad_conf_entry));
223         else
224                 do_set_mux((*ctrl)->control_padconf_core_base,
225                            core_padconf_array_non_essential_4460,
226                            sizeof(core_padconf_array_non_essential_4460) /
227                            sizeof(struct pad_conf_entry));
228
229         do_set_mux((*ctrl)->control_padconf_wkup_base,
230                    wkup_padconf_array_non_essential,
231                    sizeof(wkup_padconf_array_non_essential) /
232                    sizeof(struct pad_conf_entry));
233
234         if (omap_revision() < OMAP4460_ES1_0)
235                 do_set_mux((*ctrl)->control_padconf_wkup_base,
236                            wkup_padconf_array_non_essential_4430,
237                            sizeof(wkup_padconf_array_non_essential_4430) /
238                            sizeof(struct pad_conf_entry));
239 }
240
241 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_GENERIC_MMC)
242 int board_mmc_init(bd_t *bis)
243 {
244         return omap_mmc_init(0, 0, 0, -1, -1);
245 }
246 #endif
247
248 #ifdef CONFIG_USB_EHCI
249
250 static struct omap_usbhs_board_data usbhs_bdata = {
251         .port_mode[0] = OMAP_EHCI_PORT_MODE_PHY,
252         .port_mode[1] = OMAP_USBHS_PORT_MODE_UNUSED,
253         .port_mode[2] = OMAP_USBHS_PORT_MODE_UNUSED,
254 };
255
256 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
257 {
258         int ret;
259         unsigned int utmi_clk;
260
261         /* Now we can enable our port clocks */
262         utmi_clk = readl((void *)CM_L3INIT_HSUSBHOST_CLKCTRL);
263         utmi_clk |= HSUSBHOST_CLKCTRL_CLKSEL_UTMI_P1_MASK;
264         sr32((void *)CM_L3INIT_HSUSBHOST_CLKCTRL, 0, 32, utmi_clk);
265
266         ret = omap_ehci_hcd_init(&usbhs_bdata, hccr, hcor);
267         if (ret < 0)
268                 return ret;
269
270         return 0;
271 }
272
273 int ehci_hcd_stop(int index)
274 {
275         return omap_ehci_hcd_stop();
276 }
277 #endif
278
279 /*
280  * get_board_rev() - get board revision
281  */
282 u32 get_board_rev(void)
283 {
284         return 0x20;
285 }