3 * Ben Gray <ben.r.gray@gmail.com>.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the company nor the name of the author may be used to
15 * endorse or promote products derived from this software without specific
16 * prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY BEN GRAY ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL BEN GRAY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
40 #include <machine/bus.h>
41 #include <machine/pte.h>
42 #include <machine/vmparam.h>
43 #include <machine/fdt.h>
45 #include <arm/ti/omap4/omap4var.h>
46 #include <arm/ti/omap4/omap4_reg.h>
48 /* Registers in the SCRM that control the AUX clocks */
49 #define SCRM_ALTCLKSRC (0x110)
50 #define SCRM_AUXCLK0 (0x0310)
51 #define SCRM_AUXCLK1 (0x0314)
52 #define SCRM_AUXCLK2 (0x0318)
53 #define SCRM_AUXCLK3 (0x031C)
55 /* Some of the GPIO register set */
56 #define GPIO1_OE (0x0134)
57 #define GPIO1_CLEARDATAOUT (0x0190)
58 #define GPIO1_SETDATAOUT (0x0194)
59 #define GPIO2_OE (0x0134)
60 #define GPIO2_CLEARDATAOUT (0x0190)
61 #define GPIO2_SETDATAOUT (0x0194)
63 /* Some of the PADCONF register set */
64 #define CONTROL_WKUP_PAD0_FREF_CLK3_OUT (0x058)
65 #define CONTROL_CORE_PAD1_KPD_COL2 (0x186)
66 #define CONTROL_CORE_PAD0_GPMC_WAIT1 (0x08C)
68 #define REG_WRITE32(r, x) *((volatile uint32_t*)(r)) = (uint32_t)(x)
69 #define REG_READ32(r) *((volatile uint32_t*)(r))
71 #define REG_WRITE16(r, x) *((volatile uint16_t*)(r)) = (uint16_t)(x)
72 #define REG_READ16(r) *((volatile uint16_t*)(r))
75 * usb_hub_init - initialises and resets the external USB hub
77 * The USB hub needs to be held in reset while the power is being applied
78 * and the reference clock is enabled at 19.2MHz. The following is the
79 * layout of the USB hub taken from the Pandaboard reference manual.
82 * .-------------. .--------------. .----------------.
83 * | OMAP4430 | | USB3320C | | LAN9514 |
84 * | | | | | USB Hub / Eth |
85 * | CLK | <------ | CLKOUT | | |
86 * | STP | ------> | STP | | |
87 * | DIR | <------ | DIR | | |
88 * | NXT | <------ | NXT | | |
89 * | DAT0 | <-----> | DAT0 | | |
90 * | DAT1 | <-----> | DAT1 DP | <-----> | DP |
91 * | DAT2 | <-----> | DAT2 DM | <-----> | DM |
92 * | DAT3 | <-----> | DAT3 | | |
93 * | DAT4 | <-----> | DAT4 | | |
94 * | DAT5 | <-----> | DAT5 | +----> | N_RESET |
95 * | DAT6 | <-----> | DAT6 | | | |
96 * | DAT7 | <-----> | DAT7 | | | |
97 * | | | | | +-> | VDD33IO |
98 * | AUX_CLK3 | ------> | REFCLK | | +-> | VDD33A |
100 * | GPIO_62 | --+---> | RESET | | | | |
102 * | | | '--------------' | | '----------------'
103 * | | | .--------------. | |
104 * | | '---->| VOLT CONVERT |--' |
105 * | | '--------------' |
107 * | | .--------------. |
108 * | GPIO_1 | ------> | TPS73633 |-----'
109 * | | '--------------'
119 bus_space_handle_t scrm_addr, gpio1_addr, gpio2_addr, scm_addr;
121 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_SCRM_HWBASE,
122 OMAP44XX_SCRM_SIZE, 0, &scrm_addr) != 0)
123 panic("Couldn't map SCRM registers");
124 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_GPIO1_HWBASE,
125 OMAP44XX_GPIO1_SIZE, 0, &gpio1_addr) != 0)
126 panic("Couldn't map GPIO1 registers");
127 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_GPIO2_HWBASE,
128 OMAP44XX_GPIO2_SIZE, 0, &gpio2_addr) != 0)
129 panic("Couldn't map GPIO2 registers");
130 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_SCM_PADCONF_HWBASE,
131 OMAP44XX_SCM_PADCONF_SIZE, 0, &scm_addr) != 0)
132 panic("Couldn't map SCM Padconf registers");
136 /* Need to set FREF_CLK3_OUT to 19.2 MHz and pump it out on pin GPIO_WK31.
137 * We know the SYS_CLK is 38.4Mhz and therefore to get the needed 19.2Mhz,
138 * just use a 2x divider and ensure the SYS_CLK is used as the source.
140 REG_WRITE32(scrm_addr + SCRM_AUXCLK3, (1 << 16) | /* Divider of 2 */
141 (0 << 1) | /* Use the SYS_CLK as the source */
142 (1 << 8)); /* Enable the clock */
144 /* Enable the clock out to the pin (GPIO_WK31).
145 * muxmode=fref_clk3_out, pullup/down=disabled, input buffer=disabled,
148 REG_WRITE16(scm_addr + CONTROL_WKUP_PAD0_FREF_CLK3_OUT, 0x0000);
151 /* Disable the power to the USB hub, drive GPIO1 low */
152 REG_WRITE32(gpio1_addr + GPIO1_OE, REG_READ32(gpio1_addr +
153 GPIO1_OE) & ~(1UL << 1));
154 REG_WRITE32(gpio1_addr + GPIO1_CLEARDATAOUT, (1UL << 1));
155 REG_WRITE16(scm_addr + CONTROL_CORE_PAD1_KPD_COL2, 0x0003);
158 /* Reset the USB PHY and Hub using GPIO_62 */
159 REG_WRITE32(gpio2_addr + GPIO2_OE,
160 REG_READ32(gpio2_addr + GPIO2_OE) & ~(1UL << 30));
161 REG_WRITE32(gpio2_addr + GPIO2_CLEARDATAOUT, (1UL << 30));
162 REG_WRITE16(scm_addr + CONTROL_CORE_PAD0_GPMC_WAIT1, 0x0003);
164 REG_WRITE32(gpio2_addr + GPIO2_SETDATAOUT, (1UL << 30));
167 /* Enable power to the hub (GPIO_1) */
168 REG_WRITE32(gpio1_addr + GPIO1_SETDATAOUT, (1UL << 1));
169 bus_space_unmap(fdtbus_bs_tag, scrm_addr, OMAP44XX_SCRM_SIZE);
170 bus_space_unmap(fdtbus_bs_tag, gpio1_addr, OMAP44XX_GPIO1_SIZE);
171 bus_space_unmap(fdtbus_bs_tag, gpio2_addr, OMAP44XX_GPIO2_SIZE);
172 bus_space_unmap(fdtbus_bs_tag, scm_addr, OMAP44XX_SCM_PADCONF_SIZE);
176 * board_init - initialises the pandaboard
179 * This function is called before any of the driver are initialised, which is
180 * annoying because it means we can't use the SCM, PRCM and GPIO modules which
181 * would really be useful.
188 * - virt/phys mappings from the devmap (see omap4.c)
192 * So we are hamstrung without the useful drivers and we have to go back to
193 * direct register manupulation. Luckly we don't have to do to much, basically
194 * just setup the usb hub/ethernet.
198 board_init(void *dummy)
200 /* Initialise the USB phy and hub */
204 * XXX Board identification e.g. read out from FPGA or similar should
209 SYSINIT(board_init, SI_SUB_CPU, SI_ORDER_THIRD, board_init, NULL);