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/pmap.h>
43 #include <machine/vmparam.h>
44 #include <machine/fdt.h>
46 #include <arm/ti/omap4/omap4var.h>
47 #include <arm/ti/omap4/omap4_reg.h>
49 /* Registers in the SCRM that control the AUX clocks */
50 #define SCRM_ALTCLKSRC (0x110)
51 #define SCRM_AUXCLK0 (0x0310)
52 #define SCRM_AUXCLK1 (0x0314)
53 #define SCRM_AUXCLK2 (0x0318)
54 #define SCRM_AUXCLK3 (0x031C)
56 /* Some of the GPIO register set */
57 #define GPIO1_OE (0x0134)
58 #define GPIO1_CLEARDATAOUT (0x0190)
59 #define GPIO1_SETDATAOUT (0x0194)
60 #define GPIO2_OE (0x0134)
61 #define GPIO2_CLEARDATAOUT (0x0190)
62 #define GPIO2_SETDATAOUT (0x0194)
64 /* Some of the PADCONF register set */
65 #define CONTROL_WKUP_PAD0_FREF_CLK3_OUT (0x058)
66 #define CONTROL_CORE_PAD1_KPD_COL2 (0x186)
67 #define CONTROL_CORE_PAD0_GPMC_WAIT1 (0x08C)
69 #define REG_WRITE32(r, x) *((volatile uint32_t*)(r)) = (uint32_t)(x)
70 #define REG_READ32(r) *((volatile uint32_t*)(r))
72 #define REG_WRITE16(r, x) *((volatile uint16_t*)(r)) = (uint16_t)(x)
73 #define REG_READ16(r) *((volatile uint16_t*)(r))
76 * usb_hub_init - initialises and resets the external USB hub
78 * The USB hub needs to be held in reset while the power is being applied
79 * and the reference clock is enabled at 19.2MHz. The following is the
80 * layout of the USB hub taken from the Pandaboard reference manual.
83 * .-------------. .--------------. .----------------.
84 * | OMAP4430 | | USB3320C | | LAN9514 |
85 * | | | | | USB Hub / Eth |
86 * | CLK | <------ | CLKOUT | | |
87 * | STP | ------> | STP | | |
88 * | DIR | <------ | DIR | | |
89 * | NXT | <------ | NXT | | |
90 * | DAT0 | <-----> | DAT0 | | |
91 * | DAT1 | <-----> | DAT1 DP | <-----> | DP |
92 * | DAT2 | <-----> | DAT2 DM | <-----> | DM |
93 * | DAT3 | <-----> | DAT3 | | |
94 * | DAT4 | <-----> | DAT4 | | |
95 * | DAT5 | <-----> | DAT5 | +----> | N_RESET |
96 * | DAT6 | <-----> | DAT6 | | | |
97 * | DAT7 | <-----> | DAT7 | | | |
98 * | | | | | +-> | VDD33IO |
99 * | AUX_CLK3 | ------> | REFCLK | | +-> | VDD33A |
101 * | GPIO_62 | --+---> | RESET | | | | |
103 * | | | '--------------' | | '----------------'
104 * | | | .--------------. | |
105 * | | '---->| VOLT CONVERT |--' |
106 * | | '--------------' |
108 * | | .--------------. |
109 * | GPIO_1 | ------> | TPS73633 |-----'
110 * | | '--------------'
120 bus_space_handle_t scrm_addr, gpio1_addr, gpio2_addr, scm_addr;
122 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_SCRM_HWBASE,
123 OMAP44XX_SCRM_SIZE, 0, &scrm_addr) != 0)
124 panic("Couldn't map SCRM registers");
125 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_GPIO1_HWBASE,
126 OMAP44XX_GPIO1_SIZE, 0, &gpio1_addr) != 0)
127 panic("Couldn't map GPIO1 registers");
128 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_GPIO2_HWBASE,
129 OMAP44XX_GPIO2_SIZE, 0, &gpio2_addr) != 0)
130 panic("Couldn't map GPIO2 registers");
131 if (bus_space_map(fdtbus_bs_tag, OMAP44XX_SCM_PADCONF_HWBASE,
132 OMAP44XX_SCM_PADCONF_SIZE, 0, &scm_addr) != 0)
133 panic("Couldn't map SCM Padconf registers");
137 /* Need to set FREF_CLK3_OUT to 19.2 MHz and pump it out on pin GPIO_WK31.
138 * We know the SYS_CLK is 38.4Mhz and therefore to get the needed 19.2Mhz,
139 * just use a 2x divider and ensure the SYS_CLK is used as the source.
141 REG_WRITE32(scrm_addr + SCRM_AUXCLK3, (1 << 16) | /* Divider of 2 */
142 (0 << 1) | /* Use the SYS_CLK as the source */
143 (1 << 8)); /* Enable the clock */
145 /* Enable the clock out to the pin (GPIO_WK31).
146 * muxmode=fref_clk3_out, pullup/down=disabled, input buffer=disabled,
149 REG_WRITE16(scm_addr + CONTROL_WKUP_PAD0_FREF_CLK3_OUT, 0x0000);
152 /* Disable the power to the USB hub, drive GPIO1 low */
153 REG_WRITE32(gpio1_addr + GPIO1_OE, REG_READ32(gpio1_addr +
154 GPIO1_OE) & ~(1UL << 1));
155 REG_WRITE32(gpio1_addr + GPIO1_CLEARDATAOUT, (1UL << 1));
156 REG_WRITE16(scm_addr + CONTROL_CORE_PAD1_KPD_COL2, 0x0003);
159 /* Reset the USB PHY and Hub using GPIO_62 */
160 REG_WRITE32(gpio2_addr + GPIO2_OE,
161 REG_READ32(gpio2_addr + GPIO2_OE) & ~(1UL << 30));
162 REG_WRITE32(gpio2_addr + GPIO2_CLEARDATAOUT, (1UL << 30));
163 REG_WRITE16(scm_addr + CONTROL_CORE_PAD0_GPMC_WAIT1, 0x0003);
165 REG_WRITE32(gpio2_addr + GPIO2_SETDATAOUT, (1UL << 30));
168 /* Enable power to the hub (GPIO_1) */
169 REG_WRITE32(gpio1_addr + GPIO1_SETDATAOUT, (1UL << 1));
170 bus_space_unmap(fdtbus_bs_tag, scrm_addr, OMAP44XX_SCRM_SIZE);
171 bus_space_unmap(fdtbus_bs_tag, gpio1_addr, OMAP44XX_GPIO1_SIZE);
172 bus_space_unmap(fdtbus_bs_tag, gpio2_addr, OMAP44XX_GPIO2_SIZE);
173 bus_space_unmap(fdtbus_bs_tag, scm_addr, OMAP44XX_SCM_PADCONF_SIZE);
177 * board_init - initialises the pandaboard
180 * This function is called before any of the driver are initialised, which is
181 * annoying because it means we can't use the SCM, PRCM and GPIO modules which
182 * would really be useful.
189 * - virt/phys mappings from the devmap (see omap4.c)
193 * So we are hamstrung without the useful drivers and we have to go back to
194 * direct register manupulation. Luckly we don't have to do to much, basically
195 * just setup the usb hub/ethernet.
199 board_init(void *dummy)
201 /* Initialise the USB phy and hub */
205 * XXX Board identification e.g. read out from FPGA or similar should
210 SYSINIT(board_init, SI_SUB_CPU, SI_ORDER_THIRD, board_init, NULL);