/* * (C) 2007 Pengutronix, Sascha Hauer * (C) 2016 Alexander Kurz * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Board support for the Amazon Kindle 3rd generation */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 16 byte id for serial number */ #define ATAG_SERIAL16 0x5441000a /* 16 byte id for a board revision */ #define ATAG_REVISION16 0x5441000b struct char16_tag { char data[16]; }; static struct tag *setup_16char_tag(struct tag *params, uint32_t tag, const char *value) { struct char16_tag *target; target = ((void *) params) + sizeof(struct tag_header); params->hdr.tag = tag; params->hdr.size = tag_size(char16_tag); memcpy(target->data, value, sizeof target->data); return tag_next(params); } static const char *get_env_16char_tag(const char *tag) { static const char *default16 = "0000000000000000"; const char *value; value = getenv(tag); if (!value) { printf("env var %s not found, using default\n", tag); return default16; } if (strlen(value) != 16) { printf("env var %s: expecting 16 characters, using default\n", tag); return default16; } printf("%s: %s\n", tag, value); return value; } BAREBOX_MAGICVAR_NAMED(global_atags_serial16, global.board.serial16, "Pass the kindle Serial as vendor-specific ATAG to linux"); BAREBOX_MAGICVAR_NAMED(global_atags_revision16, global.board.revision16, "Pass the kindle BoardId as vendor-specific ATAG to linux"); /* The Kindle3 Kernel expects two custom ATAGs, ATAG_REVISION16 describing * the board and ATAG_SERIAL16 to identify the individual device. */ struct tag *kindle3_append_atags(struct tag *params) { params = setup_16char_tag(params, ATAG_SERIAL16, get_env_16char_tag("global.board.serial16")); params = setup_16char_tag(params, ATAG_REVISION16, get_env_16char_tag("global.board.revision16")); return params; } static struct fsl_usb2_platform_data kindle3_usb_info = { .operating_mode = FSL_USB2_DR_DEVICE, .phy_mode = FSL_USB2_PHY_UTMI, }; /* SPI master devices. */ static int kindle3_spi0_internal_chipselect[] = { IMX_GPIO_NR(1, 18), }; static struct spi_imx_master kindle3_spi0_info = { .chipselect = kindle3_spi0_internal_chipselect, .num_chipselect = ARRAY_SIZE(kindle3_spi0_internal_chipselect), }; static const struct spi_board_info kindle3_spi_board_info[] = { { .name = "mc13892", .bus_num = 0, .chip_select = 0, .mode = SPI_CS_HIGH, }, }; static int kindle3_mmu_init(void) { l2x0_init((void __iomem *)0x30000000, 0x00030024, 0x00000000); return 0; } postmmu_initcall(kindle3_mmu_init); static int kindle3_devices_init(void) { imx35_add_mmc0(NULL); if (IS_ENABLED(CONFIG_USB_GADGET)) { unsigned int tmp; /* Workaround ENGcm09152 */ tmp = readl(MX35_USB_OTG_BASE_ADDR + 0x608); writel(tmp | (1 << 23), MX35_USB_OTG_BASE_ADDR + 0x608); add_generic_device("fsl-udc", DEVICE_ID_DYNAMIC, NULL, MX35_USB_OTG_BASE_ADDR, 0x200, IORESOURCE_MEM, &kindle3_usb_info); } /* The kindle3 related linux patch published by amazon bluntly * renamed MACH_MX35_3DS to MACH_MX35_LUIGI */ armlinux_set_architecture(MACH_TYPE_MX35_3DS); /* Compatibility ATAGs for original kernel */ armlinux_set_atag_appender(kindle3_append_atags); return 0; } device_initcall(kindle3_devices_init); static iomux_v3_cfg_t kindle3_pads[] = { /* UART1 */ MX35_PAD_RXD1__UART1_RXD_MUX, MX35_PAD_TXD1__UART1_TXD_MUX, /* eMMC */ MX35_PAD_SD1_CMD__ESDHC1_CMD, MX35_PAD_SD1_CLK__ESDHC1_CLK, MX35_PAD_SD1_DATA0__ESDHC1_DAT0, MX35_PAD_SD1_DATA1__ESDHC1_DAT1, MX35_PAD_SD1_DATA2__ESDHC1_DAT2, MX35_PAD_SD1_DATA3__ESDHC1_DAT3, /* USB */ MX35_PAD_USBOTG_PWR__USB_TOP_USBOTG_PWR, MX35_PAD_USBOTG_OC__USB_TOP_USBOTG_OC, /* I2C 1+2 */ MX35_PAD_I2C1_CLK__I2C1_SCL, MX35_PAD_I2C1_DAT__I2C1_SDA, MX35_PAD_I2C2_CLK__I2C2_SCL, MX35_PAD_I2C2_DAT__I2C2_SDA, /* SPI */ MX35_PAD_CSPI1_SS0__GPIO1_18, MX35_PAD_CSPI1_SCLK__CSPI1_SCLK, MX35_PAD_CSPI1_MOSI__CSPI1_MOSI, MX35_PAD_CSPI1_MISO__CSPI1_MISO, MX35_PAD_CSPI1_SPI_RDY__CSPI1_RDY, /* fiveway device: up, down, left, right, select */ MX35_PAD_ATA_DATA14__GPIO2_27, MX35_PAD_ATA_DATA15__GPIO2_28, MX35_PAD_TX5_RX0__GPIO1_10, MX35_PAD_ATA_BUFF_EN__GPIO2_30, IOMUX_PAD(0x728, 0x2c4, 5, 0x8c8, 1, PAD_CTL_PUS_100K_UP | PAD_CTL_HYS | PAD_CTL_DVS), /* Volume keys: up, down */ MX35_PAD_SCKR__GPIO1_4, MX35_PAD_FSR__GPIO1_5, }; static int kindle3_part_init(void) { devfs_add_partition("disk0", SZ_1K, 2 * SZ_1K, DEVFS_PARTITION_FIXED, "disk0.imx_header"); devfs_add_partition("disk0", 4 * SZ_1K, (192 - 1) * SZ_1K, DEVFS_PARTITION_FIXED, "disk0.self"); devfs_add_partition("disk0", (192 + 3) * SZ_1K, SZ_64K, DEVFS_PARTITION_FIXED, "env0"); devfs_add_partition("disk0", (256 + 3) * SZ_1K, SZ_1K, DEVFS_PARTITION_FIXED, "disk0.serial"); devfs_add_partition("disk0", (256 + 4) * SZ_1K, 3407872, DEVFS_PARTITION_FIXED, "disk0.kernel"); devfs_add_partition("disk0", 3674112, SZ_256K, DEVFS_PARTITION_FIXED, "disk0.waveform"); return 0; } late_initcall(kindle3_part_init); static int imx35_console_init(void) { mxc_iomux_v3_setup_multiple_pads(kindle3_pads, ARRAY_SIZE(kindle3_pads)); barebox_set_model("Kindle3"); barebox_set_hostname("kindle3"); imx35_add_uart0(); spi_register_board_info(kindle3_spi_board_info, ARRAY_SIZE(kindle3_spi_board_info)); imx35_add_spi0(&kindle3_spi0_info); imx35_add_i2c0(NULL); imx35_add_i2c1(NULL); return 0; } console_initcall(imx35_console_init); static int kindle3_core_setup(void) { u32 tmp; /* AIPS setup - Only setup MPROTx registers. * The PACR default values are good. */ /* * Set all MPROTx to be non-bufferable, trusted for R/W, * not forced to user-mode. */ writel(0x77777777, MX35_AIPS1_BASE_ADDR); writel(0x77777777, MX35_AIPS1_BASE_ADDR + 0x4); writel(0x77777777, MX35_AIPS2_BASE_ADDR); writel(0x77777777, MX35_AIPS2_BASE_ADDR + 0x4); /* * Clear the on and off peripheral modules Supervisor Protect bit * for SDMA to access them. Did not change the AIPS control registers * (offset 0x20) access type */ writel(0x0, MX35_AIPS1_BASE_ADDR + 0x40); writel(0x0, MX35_AIPS1_BASE_ADDR + 0x44); writel(0x0, MX35_AIPS1_BASE_ADDR + 0x48); writel(0x0, MX35_AIPS1_BASE_ADDR + 0x4C); tmp = readl(MX35_AIPS1_BASE_ADDR + 0x50); tmp &= 0x00FFFFFF; writel(tmp, MX35_AIPS1_BASE_ADDR + 0x50); writel(0x0, MX35_AIPS2_BASE_ADDR + 0x40); writel(0x0, MX35_AIPS2_BASE_ADDR + 0x44); writel(0x0, MX35_AIPS2_BASE_ADDR + 0x48); writel(0x0, MX35_AIPS2_BASE_ADDR + 0x4C); tmp = readl(MX35_AIPS2_BASE_ADDR + 0x50); tmp &= 0x00FFFFFF; writel(tmp, MX35_AIPS2_BASE_ADDR + 0x50); /* MAX (Multi-Layer AHB Crossbar Switch) setup */ /* MPR - priority is M4 > M2 > M3 > M5 > M0 > M1 */ #define MAX_PARAM1 0x00302154 writel(MAX_PARAM1, MX35_MAX_BASE_ADDR + 0x0); /* for S0 */ writel(MAX_PARAM1, MX35_MAX_BASE_ADDR + 0x100); /* for S1 */ writel(MAX_PARAM1, MX35_MAX_BASE_ADDR + 0x200); /* for S2 */ writel(MAX_PARAM1, MX35_MAX_BASE_ADDR + 0x300); /* for S3 */ writel(MAX_PARAM1, MX35_MAX_BASE_ADDR + 0x400); /* for S4 */ /* SGPCR - always park on last master */ writel(0x10, MX35_MAX_BASE_ADDR + 0x10); /* for S0 */ writel(0x10, MX35_MAX_BASE_ADDR + 0x110); /* for S1 */ writel(0x10, MX35_MAX_BASE_ADDR + 0x210); /* for S2 */ writel(0x10, MX35_MAX_BASE_ADDR + 0x310); /* for S3 */ writel(0x10, MX35_MAX_BASE_ADDR + 0x410); /* for S4 */ /* MGPCR - restore default values */ writel(0x0, MX35_MAX_BASE_ADDR + 0x800); /* for M0 */ writel(0x0, MX35_MAX_BASE_ADDR + 0x900); /* for M1 */ writel(0x0, MX35_MAX_BASE_ADDR + 0xa00); /* for M2 */ writel(0x0, MX35_MAX_BASE_ADDR + 0xb00); /* for M3 */ writel(0x0, MX35_MAX_BASE_ADDR + 0xc00); /* for M4 */ writel(0x0, MX35_MAX_BASE_ADDR + 0xd00); /* for M5 */ /* * M3IF Control Register (M3IFCTL) * MRRP[0] = L2CC0 not on priority list (0 << 0) = 0x00000000 * MRRP[1] = MAX1 not on priority list (0 << 0) = 0x00000000 * MRRP[2] = L2CC1 not on priority list (0 << 0) = 0x00000000 * MRRP[3] = USB not on priority list (0 << 0) = 0x00000000 * MRRP[4] = SDMA not on priority list (0 << 0) = 0x00000000 * MRRP[5] = GPU not on priority list (0 << 0) = 0x00000000 * MRRP[6] = IPU1 on priority list (1 << 6) = 0x00000040 * MRRP[7] = IPU2 not on priority list (0 << 0) = 0x00000000 * ------------ * 0x00000040 */ writel(0x40, MX35_M3IF_BASE_ADDR); return 0; } core_initcall(kindle3_core_setup);