From 9321fa69767a5eaafdcdc4dee31082d057355ff6 Mon Sep 17 00:00:00 2001 From: Lyle_Lin Date: Mon, 21 Aug 2017 18:36:00 +0800 Subject: [PATCH] Add node /proc/board_info to display board info MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit cat /proc/board_info Display project id, RAM id, PCB id. Change-Id: I5163fb1004d967e367e74b57e89a93464cd19283 Reviewed-on: https://tp-biosrd-v02/gerrit/80253 Reviewed-by: Alex Cheng(鄭富元) Tested-by: Alex Cheng(鄭富元) --- drivers/Makefile | 1 + drivers/board-info/Makefile | 1 + drivers/board-info/board-info.c | 217 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 219 insertions(+) create mode 100644 drivers/board-info/Makefile create mode 100644 drivers/board-info/board-info.c diff --git a/drivers/Makefile b/drivers/Makefile index 4d00308c..a2a82b39 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -181,4 +181,5 @@ obj-$(CONFIG_RK_HEADSET) += headset_observe/ obj-$(CONFIG_RK_FLASH) += rkflash/ obj-y += rk_nand/ -obj-y += tinkerboard/ \ No newline at end of file +obj-y += tinkerboard/ +obj-y += board-info/ diff --git a/drivers/board-info/Makefile b/drivers/board-info/Makefile new file mode 100644 index 000000000000..6e67808f08e9 --- /dev/null +++ b/drivers/board-info/Makefile @@ -0,0 +1 @@ +obj-y += board-info.o diff --git a/drivers/board-info/board-info.c b/drivers/board-info/board-info.c new file mode 100644 index 000000000000..7c70bb049461 --- /dev/null +++ b/drivers/board-info/board-info.c @@ -0,0 +1,217 @@ +/* NOTICE: + * This file is for asus project id pins, + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + + +/* Project id (GPIO2_A3, GPIO2_A2, GPIO2_A1) + * Ram id (GPIO2_B6, GPIO2_B5, GPIO2_B4) + * PCB id (GPIO2_B2, GPIO2_B1 ,GPIO2_B0) + */ +#define GPIO2_A1 57 +#define GPIO2_A2 58 +#define GPIO2_A3 59 +#define GPIO2_B0 64 +#define GPIO2_B1 65 +#define GPIO2_B2 66 +#define GPIO2_B4 68 +#define GPIO2_B5 69 +#define GPIO2_B6 70 + +/* board hardware parameter*/ +int project_id_0, project_id_1, project_id_2; +int ram_id_0, ram_id_1, ram_id_2; +int pcb_id_0, pcb_id_1, pcb_id_2; + +void *regs; +int err; + +char *board_type = "Unknown Board type"; +char *ram_size = "Unknown RAM size"; +char *pcb = "Unknown PCB"; + +static struct proc_dir_entry *project_id_proc_file; + +static void read_project_id(void) +{ + err = gpio_request(GPIO2_A1, "project_id_0"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_A1 %d\n", __func__, GPIO2_A1); + return ; + } else { + gpio_direction_input(GPIO2_A1); + project_id_0 = gpio_get_value(GPIO2_A1); + } + err = gpio_request(GPIO2_A2, "project_id_1"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_A2 %d\n", __func__, GPIO2_A2); + return ; + } else { + gpio_direction_input(GPIO2_A2); + project_id_1 = gpio_get_value(GPIO2_A2); + } + err = gpio_request(GPIO2_A3, "project_id_2"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_A3 %d\n", __func__, GPIO2_A3); + return ; + } else { + gpio_direction_input(GPIO2_A3); + project_id_2 = gpio_get_value(GPIO2_A3); + } + + printk("project_id_2:0x%x, project_id_1:0x%x, project_id_0:0x%x \n", + project_id_2, project_id_1, project_id_0); + + if (project_id_2 == 0 && project_id_1 == 0 && project_id_0 == 0) + board_type = "Tinker Board S"; + else if (project_id_2 == 1 && project_id_1 == 1 && project_id_0 == 1) + board_type = "Tinker Board"; + else + board_type = "unknown board name"; +} + +static void read_ram_id(void) +{ + err = gpio_request(GPIO2_B4, "ram_id_0"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_B4 %d\n", __func__, GPIO2_B4); + return ; + } else { + gpio_direction_input(GPIO2_B4); + ram_id_0 = gpio_get_value(GPIO2_B4); + } + err = gpio_request(GPIO2_B5, "ram_id_1"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_B5 %d\n", __func__, GPIO2_B5); + return ; + } else { + gpio_direction_input(GPIO2_B5); + ram_id_1 = gpio_get_value(GPIO2_B5); + } + err = gpio_request(GPIO2_B6, "ram_id_2"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_B6 %d\n", __func__, GPIO2_B6); + return ; + } else { + gpio_direction_input(GPIO2_B6); + ram_id_2 = gpio_get_value(GPIO2_B6); + } + + printk("ram_id_2:0x%x, ram_id_1:0x%x, ram_id_0:0x%x \n", + ram_id_2, ram_id_1, ram_id_0); + + if (ram_id_2 == 0 && ram_id_1 == 0 && ram_id_0 == 0) + ram_size = "4 GB"; + else if (ram_id_2 == 0 && ram_id_1 == 1 && ram_id_0 == 0) + ram_size = "2 GB"; + else if (ram_id_2 == 1 && ram_id_1 == 0 && ram_id_0 == 0) + ram_size = "1 GB"; + else + ram_size = "unknown ram"; +} + +static void read_pcb_id(void) +{ + err = gpio_request(GPIO2_B0, "pcb_id_0"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_B0 %d\n", __func__, GPIO2_B0); + return ; + } else { + gpio_direction_input(GPIO2_B0); + pcb_id_0 = gpio_get_value(GPIO2_B0); + } + err = gpio_request(GPIO2_B1, "pcb_id_1"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_B1 %d\n", __func__, GPIO2_B1); + return ; + } else { + gpio_direction_input(GPIO2_B1); + pcb_id_1 = gpio_get_value(GPIO2_B1); + } + err = gpio_request(GPIO2_B2, "pcb_id_2"); + if (err < 0) { + printk("%s: gpio_request failed for GPIO2_B2 %d\n", __func__, GPIO2_B2); + return ; + } else { + gpio_direction_input(GPIO2_B2); + pcb_id_2 = gpio_get_value(GPIO2_B2); + } + + printk("pcb_id_2:0x%x, pcb_id_1:0x%x, pcb_id_0:0x%x \n", + pcb_id_2, pcb_id_1, pcb_id_0); + + if (pcb_id_2 == 0 && pcb_id_1 == 0 && pcb_id_0 == 0) + pcb = "SR"; + else if (pcb_id_2 == 0 && pcb_id_1 == 0 && pcb_id_0 == 1) + pcb = "ER"; + else if (pcb_id_2 == 0 && pcb_id_1 == 1 && pcb_id_0 == 0) + pcb = "PR"; + else + pcb = "unknown pcb"; +} + +static int board_info_proc_read(struct seq_file *buf, void *v) +{ + /* Board info display */ + seq_printf(buf, "%s\n%s\n%s\n", board_type, ram_size, pcb); + printk("[board_info] %s board_type=\'%s\' ram_size=\'%s' pcb=\'%s\'\n", + __func__, board_type, ram_size, pcb); + return 0; +} + +static int project_id_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, board_info_proc_read, NULL); +} + + +static struct file_operations project_id_proc_ops = { + .open = project_id_proc_open, + .read = seq_read, + .release = single_release, +}; + +static void create_project_id_proc_file(void) +{ + project_id_proc_file = proc_create("board_info", 0444, NULL, + &project_id_proc_ops); + if (project_id_proc_file) { + printk("[board_info] create Board_info_proc_file sucessed!\n"); + } else { + printk("[board_info] create Board_info_proc_file failed!\n"); + } + + /* Pull up GPIO2 A1 A2 A3*/ + regs = ioremap(RK3288_GRF_PHYS, 64*1024); + if (regs == NULL) { + printk("[board_info] ioremap failed"); + return ; + } + writel((readl(regs + RK3288_GRF_GPIO2A_P) & ~(0x3f << 18) & ~(0x3f << 2)) + | (0x3f << 18) | (0x15 << 2), regs + RK3288_GRF_GPIO2A_P); + // printk("[board_info] %x\n", readl(regs + RK3288_GRF_GPIO2A_P)); + + iounmap(regs); + + /* Read GPIO */ + read_project_id(); + read_ram_id(); + read_pcb_id(); +} + +static int __init proc_asusPRJ_init(void) +{ + create_project_id_proc_file(); + return 0; +} + +module_init(proc_asusPRJ_init);