| 1 | /* |
| 2 | * Copyright 2000, 2008 MontaVista Software Inc. |
| 3 | * Author: MontaVista Software, Inc. <source@mvista.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | * |
| 10 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 11 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 13 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 14 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 15 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 16 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 17 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 18 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 19 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License along |
| 22 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/gpio.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/pm.h> |
| 31 | #include <asm/mach-au1x00/au1000.h> |
| 32 | #include <asm/mach-pb1x00/pb1000.h> |
| 33 | #include <asm/reboot.h> |
| 34 | #include <prom.h> |
| 35 | |
| 36 | #include "../platform.h" |
| 37 | |
| 38 | const char *get_system_type(void) |
| 39 | { |
| 40 | return "Alchemy Pb1000"; |
| 41 | } |
| 42 | |
| 43 | static void board_reset(char *c) |
| 44 | { |
| 45 | asm volatile ("jr %0" : : "r" (0xbfc00000)); |
| 46 | } |
| 47 | |
| 48 | static void board_power_off(void) |
| 49 | { |
| 50 | while (1) |
| 51 | asm volatile ( |
| 52 | " .set mips32 \n" |
| 53 | " wait \n" |
| 54 | " .set mips0 \n"); |
| 55 | } |
| 56 | |
| 57 | void __init board_setup(void) |
| 58 | { |
| 59 | u32 pin_func, static_cfg0; |
| 60 | u32 sys_freqctrl, sys_clksrc; |
| 61 | u32 prid = read_c0_prid(); |
| 62 | |
| 63 | sys_freqctrl = 0; |
| 64 | sys_clksrc = 0; |
| 65 | |
| 66 | /* Set AUX clock to 12 MHz * 8 = 96 MHz */ |
| 67 | au_writel(8, SYS_AUXPLL); |
| 68 | au_writel(0, SYS_PINSTATERD); |
| 69 | udelay(100); |
| 70 | |
| 71 | #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) |
| 72 | /* Zero and disable FREQ2 */ |
| 73 | sys_freqctrl = au_readl(SYS_FREQCTRL0); |
| 74 | sys_freqctrl &= ~0xFFF00000; |
| 75 | au_writel(sys_freqctrl, SYS_FREQCTRL0); |
| 76 | |
| 77 | /* Zero and disable USBH/USBD clocks */ |
| 78 | sys_clksrc = au_readl(SYS_CLKSRC); |
| 79 | sys_clksrc &= ~(SYS_CS_CUD | SYS_CS_DUD | SYS_CS_MUD_MASK | |
| 80 | SYS_CS_CUH | SYS_CS_DUH | SYS_CS_MUH_MASK); |
| 81 | au_writel(sys_clksrc, SYS_CLKSRC); |
| 82 | |
| 83 | sys_freqctrl = au_readl(SYS_FREQCTRL0); |
| 84 | sys_freqctrl &= ~0xFFF00000; |
| 85 | |
| 86 | sys_clksrc = au_readl(SYS_CLKSRC); |
| 87 | sys_clksrc &= ~(SYS_CS_CUD | SYS_CS_DUD | SYS_CS_MUD_MASK | |
| 88 | SYS_CS_CUH | SYS_CS_DUH | SYS_CS_MUH_MASK); |
| 89 | |
| 90 | switch (prid & 0x000000FF) { |
| 91 | case 0x00: /* DA */ |
| 92 | case 0x01: /* HA */ |
| 93 | case 0x02: /* HB */ |
| 94 | /* CPU core freq to 48 MHz to slow it way down... */ |
| 95 | au_writel(4, SYS_CPUPLL); |
| 96 | |
| 97 | /* |
| 98 | * Setup 48 MHz FREQ2 from CPUPLL for USB Host |
| 99 | * FRDIV2 = 3 -> div by 8 of 384 MHz -> 48 MHz |
| 100 | */ |
| 101 | sys_freqctrl |= (3 << SYS_FC_FRDIV2_BIT) | SYS_FC_FE2; |
| 102 | au_writel(sys_freqctrl, SYS_FREQCTRL0); |
| 103 | |
| 104 | /* CPU core freq to 384 MHz */ |
| 105 | au_writel(0x20, SYS_CPUPLL); |
| 106 | |
| 107 | printk(KERN_INFO "Au1000: 48 MHz OHCI workaround enabled\n"); |
| 108 | break; |
| 109 | |
| 110 | default: /* HC and newer */ |
| 111 | /* FREQ2 = aux / 2 = 48 MHz */ |
| 112 | sys_freqctrl |= (0 << SYS_FC_FRDIV2_BIT) | |
| 113 | SYS_FC_FE2 | SYS_FC_FS2; |
| 114 | au_writel(sys_freqctrl, SYS_FREQCTRL0); |
| 115 | break; |
| 116 | } |
| 117 | |
| 118 | /* |
| 119 | * Route 48 MHz FREQ2 into USB Host and/or Device |
| 120 | */ |
| 121 | sys_clksrc |= SYS_CS_MUX_FQ2 << SYS_CS_MUH_BIT; |
| 122 | au_writel(sys_clksrc, SYS_CLKSRC); |
| 123 | |
| 124 | /* Configure pins GPIO[14:9] as GPIO */ |
| 125 | pin_func = au_readl(SYS_PINFUNC) & ~(SYS_PF_UR3 | SYS_PF_USB); |
| 126 | |
| 127 | /* 2nd USB port is USB host */ |
| 128 | pin_func |= SYS_PF_USB; |
| 129 | |
| 130 | au_writel(pin_func, SYS_PINFUNC); |
| 131 | |
| 132 | alchemy_gpio_direction_input(11); |
| 133 | alchemy_gpio_direction_input(13); |
| 134 | alchemy_gpio_direction_output(4, 0); |
| 135 | alchemy_gpio_direction_output(5, 0); |
| 136 | #endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */ |
| 137 | |
| 138 | /* Make GPIO 15 an input (for interrupt line) */ |
| 139 | pin_func = au_readl(SYS_PINFUNC) & ~SYS_PF_IRF; |
| 140 | /* We don't need I2S, so make it available for GPIO[31:29] */ |
| 141 | pin_func |= SYS_PF_I2S; |
| 142 | au_writel(pin_func, SYS_PINFUNC); |
| 143 | |
| 144 | alchemy_gpio_direction_input(15); |
| 145 | |
| 146 | static_cfg0 = au_readl(MEM_STCFG0) & ~0xc00; |
| 147 | au_writel(static_cfg0, MEM_STCFG0); |
| 148 | |
| 149 | /* configure RCE2* for LCD */ |
| 150 | au_writel(0x00000004, MEM_STCFG2); |
| 151 | |
| 152 | /* MEM_STTIME2 */ |
| 153 | au_writel(0x09000000, MEM_STTIME2); |
| 154 | |
| 155 | /* Set 32-bit base address decoding for RCE2* */ |
| 156 | au_writel(0x10003ff0, MEM_STADDR2); |
| 157 | |
| 158 | /* |
| 159 | * PCI CPLD setup |
| 160 | * Expand CE0 to cover PCI |
| 161 | */ |
| 162 | au_writel(0x11803e40, MEM_STADDR1); |
| 163 | |
| 164 | /* Burst visibility on */ |
| 165 | au_writel(au_readl(MEM_STCFG0) | 0x1000, MEM_STCFG0); |
| 166 | |
| 167 | au_writel(0x83, MEM_STCFG1); /* ewait enabled, flash timing */ |
| 168 | au_writel(0x33030a10, MEM_STTIME1); /* slower timing for FPGA */ |
| 169 | |
| 170 | /* Setup the static bus controller */ |
| 171 | au_writel(0x00000002, MEM_STCFG3); /* type = PCMCIA */ |
| 172 | au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */ |
| 173 | au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */ |
| 174 | |
| 175 | /* |
| 176 | * Enable Au1000 BCLK switching - note: sed1356 must not use |
| 177 | * its BCLK (Au1000 LCLK) for any timings |
| 178 | */ |
| 179 | switch (prid & 0x000000FF) { |
| 180 | case 0x00: /* DA */ |
| 181 | case 0x01: /* HA */ |
| 182 | case 0x02: /* HB */ |
| 183 | break; |
| 184 | default: /* HC and newer */ |
| 185 | /* |
| 186 | * Enable sys bus clock divider when IDLE state or no bus |
| 187 | * activity. |
| 188 | */ |
| 189 | au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL); |
| 190 | break; |
| 191 | } |
| 192 | |
| 193 | pm_power_off = board_power_off; |
| 194 | _machine_halt = board_power_off; |
| 195 | _machine_restart = board_reset; |
| 196 | } |
| 197 | |
| 198 | static int __init pb1000_init_irq(void) |
| 199 | { |
| 200 | set_irq_type(AU1000_GPIO15_INT, IRQF_TRIGGER_LOW); |
| 201 | return 0; |
| 202 | } |
| 203 | arch_initcall(pb1000_init_irq); |
| 204 | |
| 205 | static int __init pb1000_device_init(void) |
| 206 | { |
| 207 | return db1x_register_norflash(8 * 1024 * 1024, 4, 0); |
| 208 | } |
| 209 | device_initcall(pb1000_device_init); |