From: Jonas Fonseca <jonas.fonseca@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Vivien Didelot <vivien.didelot@xxxxxxxxxxxxxxxxxxxx> --- Documentation/ts5xxx-sbcinfo.txt | 47 ++++++ MAINTAINERS | 6 + drivers/platform/x86/Kconfig | 11 ++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/ts5xxx-sbcinfo.c | 254 +++++++++++++++++++++++++++++++++ include/linux/ts5xxx-sbcinfo.h | 42 ++++++ 6 files changed, 361 insertions(+), 0 deletions(-) create mode 100644 Documentation/ts5xxx-sbcinfo.txt create mode 100644 drivers/platform/x86/ts5xxx-sbcinfo.c create mode 100644 include/linux/ts5xxx-sbcinfo.h diff --git a/Documentation/ts5xxx-sbcinfo.txt b/Documentation/ts5xxx-sbcinfo.txt new file mode 100644 index 0000000..54905b1 --- /dev/null +++ b/Documentation/ts5xxx-sbcinfo.txt @@ -0,0 +1,47 @@ +TS-5xxx boards detection +======================== + +Supported boards: + * Technologic Systems TS-3100 + Manual: http://www.embeddedarm.com/documentation/ts-3100-manual.pdf + + * Technologic Systems TS-3200 + Manual: http://www.embeddedarm.com/documentation/ts-3200-manual.pdf + + * Technologic Systems TS-3300 + Manual: http://www.embeddedarm.com/documentation/ts-3300-manual.pdf + + * Technologic Systems TS-3400 + Manual: http://www.embeddedarm.com/documentation/ts-3400-manual.pdf + + * Technologic Systems TS-5300 + Manual: http://www.embeddedarm.com/documentation/ts-5300-manual.pdf + + * Technologic Systems TS-5400 + Manual: http://www.embeddedarm.com/documentation/ts-5400-manual.pdf + + * Technologic Systems TS-5500 + Manual: http://www.embeddedarm.com/documentation/ts-5500-manual.pdf + + * Technologic Systems TS-5600 + Manual: http://www.embeddedarm.com/documentation/ts-5600-manual.pdf + + * Technologic Systems TS-5700 + Manual: http://www.embeddedarm.com/documentation/ts-5700-manual.pdf + +Authors: + Liberty Young <liberty@xxxxxxxxxxxxxxx> + Jonas Fonseca <jonas.fonseca@xxxxxxxxxxxxxxxxxxxx> + Alexandre Savard <alexandre.savard@xxxxxxxxxxxxxxxxxxxx> + +Description +----------- + +The ts5xxx-sbcinfo driver provides detection for Technologic Systems TS-5xxx +Single Board Computers. This driver also works with TS-3xxx boards. + +/proc filesystem +---------------- + +Information about the TS board is available through the /proc/ts-sbcinfo. + diff --git a/MAINTAINERS b/MAINTAINERS index 1380312..b077e6d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6053,6 +6053,12 @@ W: http://tcp-lp-mod.sourceforge.net/ S: Maintained F: net/ipv4/tcp_lp.c +TECHNOLOGIC SYSTEMS TS5500 MACHINE SUPPORT +M: Savoir-faire Linux Inc. <ts-kernel@xxxxxxxxxxxxxxxxxxxx> +S: Maintained +F: drivers/platform/x86/ts5xxx-sbcinfo.c +F: include/linux/ts5xxx-sbcinfo.h + TEGRA SUPPORT M: Colin Cross <ccross@xxxxxxxxxxx> M: Erik Gilling <konkers@xxxxxxxxxxx> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 0485e39..5c25da2 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -753,4 +753,15 @@ config SAMSUNG_LAPTOP To compile this driver as a module, choose M here: the module will be called samsung-laptop. +config TS5500_SBC + tristate "Technologic Systems TS-5500 SBC support" + depends on X86_ELAN + ---help--- + This enables support for the Technologic Systems TS-5500 platform. + + It also gives access to specific device informations in the + /proc/sbcinfo file. + + If you have a TS-5500, say Y here. + endif # X86_PLATFORM_DEVICES diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 029e886..e47b449 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -42,3 +42,4 @@ obj-$(CONFIG_XO15_EBOOK) += xo15-ebook.o obj-$(CONFIG_IBM_RTL) += ibm_rtl.o obj-$(CONFIG_SAMSUNG_LAPTOP) += samsung-laptop.o obj-$(CONFIG_INTEL_MFLD_THERMAL) += intel_mid_thermal.o +obj-$(CONFIG_TS5500_SBC) += ts5xxx-sbcinfo.o diff --git a/drivers/platform/x86/ts5xxx-sbcinfo.c b/drivers/platform/x86/ts5xxx-sbcinfo.c new file mode 100644 index 0000000..ea9501b --- /dev/null +++ b/drivers/platform/x86/ts5xxx-sbcinfo.c @@ -0,0 +1,254 @@ +/* + * Technologic Systems TS-5xxx boards - SBC info layer + * + * Copyright (c) 2010 Savoir-faire Linux Inc. + * Alexandre Savard <alexandre.savard@xxxxxxxxxxxxxxxxxxxx> + * Jonas Fonseca <jonas.fonseca@xxxxxxxxxxxxxxxxxxxx> + * + * Portions originate from ts_sbcinfo.c (c) Technologic Systems + * Liberty Young <liberty@xxxxxxxxxxxxxxx> + * + * These functions add a proc ts-sbcinfo entry to display information + * about the Single Board Computer (SBC). + */ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/proc_fs.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/io.h> + +#include <linux/ts5xxx-sbcinfo.h> + +#define PROCFS_NAME "ts-sbcinfo" + +#define PROCFS_MAX_SIZE 1024 + +#define IOADDR_SBCID 0x74 +#define IOADDR_SRAM 0x75 +#define IOADDR_RESTOP 0x76 +#define IOADDR_LEDJP 0x77 + +/* Structure containing the Single Board Computer's info */ +static struct ts5xxx_sbcinfo ts_sbcinfo; + +static struct proc_dir_entry *proc_entry; +static char procfs_buffer[PROCFS_MAX_SIZE]; +static unsigned long procfs_buffer_size; + +/** + * ts5xxx_sbcinfo_set() - set the SBC info structure with the current SBC's info + * @sbcinfo: structure containing SBC info to set. + */ +void ts5xxx_sbcinfo_set(struct ts5xxx_sbcinfo *sbcinfo) +{ + memcpy(sbcinfo, &ts_sbcinfo, sizeof(*sbcinfo)); +} +EXPORT_SYMBOL(ts5xxx_sbcinfo_set); + +/** + * struct ts_sbc_config - TS SBC configuration + * @ref: SBC's reference. + * @id: ID read from the id register. + * @sram: Bit to indicate the existence of SRAM. + * @adc: Bit for analogic to digital converter. + * @rs485: Bit for RS485. + * @auto485: Bit for auto 485. + * @external_reset: Bit for external reset feature. + * @jumpers: Mask to list connected jumpers. + */ +struct ts_sbc_config { + int ref; + u8 id; + u8 sram; + u8 adc; + u8 rs485; + u8 auto485; + u8 external_reset; + u8 jumpers; +}; + +#define NONE 0x00 +#define ALWAYS 0xFF + +/* TS SBCs configurations */ +struct ts_sbc_config ts_sbcs_configs[] = { + /* Ref ID SRAM ADC RS485 Auto485 E-Reset Jprs */ + { 3100, 0x01, NONE, NONE, NONE, NONE, NONE, NONE }, + { 3200, 0x02, 0x01, NONE, NONE, NONE, NONE, NONE }, + { 3300, 0x03, 0x01, 0x04, NONE, NONE, NONE, NONE }, + { 3400, 0x04, 0x01, NONE, NONE, NONE, 0x01, NONE }, + { 5300, 0x50, 0x01, NONE, 0x02, 0x0A, NONE, 0xFE }, + { 5400, 0x40, NONE, NONE, 0x02, 0x02, NONE, 0xFE }, + { 5500, 0x60, NONE, 0x04, 0x02, 0x02, 0x01, 0xFE }, + { 5600, 0x20, 0x01, ALWAYS, 0x02, 0x02, 0x01, 0xFE }, + { 5700, 0x70, NONE, NONE, 0x02, NONE, ALWAYS, 0xFE }, +}; + +/** + * ts_find_sbc_config() - find a SBC configuration from an id + * @id: ID of the board to find. + */ +static inline struct ts_sbc_config *ts_find_sbc_config(u8 id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ts_sbcs_configs); i++) + if (id == ts_sbcs_configs[i].id) + return &ts_sbcs_configs[i]; + + return NULL; +} + +/** + * ts_sbcfeature() - detect if a feature is enabled or not + * @info: SBC's info structure to update. + * @sbc: Configuration of the SBC. + * @reg: Register containing the value. + * @feature: Structure field to update. + */ +#define ts_sbcfeature(info, sbc, reg, feature) do { \ + (info)->feature = (sbc)->feature == ALWAYS || \ + !!((reg) & (sbc)->feature); \ + } while (0) + +/** + * ts_sbcinfo_detect() - detect the TS board + * @sbcinfo: structure where to store the detected board's info. + */ +static int ts_sbcinfo_detect(struct ts5xxx_sbcinfo *sbcinfo) +{ + u8 temp; + struct ts_sbc_config *sbc; + int ret = 0; + + memset(sbcinfo, 0, sizeof(*sbcinfo)); + + if (!request_region(IOADDR_SBCID, 4, "TS-SBC")) + return -EBUSY; + + temp = inb(IOADDR_SBCID); + /* If it is a 3x00 SBC only match against the first 3 bits */ + if (temp & 0x07) + temp &= 0x07; + + sbc = ts_find_sbc_config(temp); + if (!sbc) { + ret = -ENODEV; + goto error; + } + + sbcinfo->board_id = sbc->ref; + + temp = inb(IOADDR_SRAM); + ts_sbcfeature(sbcinfo, sbc, temp, sram); + ts_sbcfeature(sbcinfo, sbc, temp, adc); + ts_sbcfeature(sbcinfo, sbc, temp, rs485); + ts_sbcfeature(sbcinfo, sbc, temp, auto485); + + temp = inb(IOADDR_RESTOP); + sbcinfo->industrial = !!(temp & 0x02); + ts_sbcfeature(sbcinfo, sbc, temp, external_reset); + + temp = inb(IOADDR_LEDJP); + sbcinfo->jumpers = temp & sbc->jumpers; + +error: + release_region(IOADDR_SBCID, 4); + return ret; +} + +#define ts_addbuf(buf, name, fmt, a...) \ + sprintf(buf, name ":%s" fmt "\n", \ + &" "[sizeof(name) - 1], a) + +static int ts_sbcinfo_init_buffer(char *buf, struct ts5xxx_sbcinfo *sbcinfo) +{ + char *pos = buf; + + pos += ts_addbuf(pos, "Board ID", "TS-%d", sbcinfo->board_id); + pos += ts_addbuf(pos, "RS485", "%s", sbcinfo->rs485 ? "yes" : "no"); + pos += ts_addbuf(pos, "AnalogToDigital", "%s", + sbcinfo->adc ? "yes" : "no"); + pos += ts_addbuf(pos, "Auto485", "%s", sbcinfo->auto485 ? "yes" : "no"); + pos += ts_addbuf(pos, "SRAM", "%s", sbcinfo->sram ? "yes" : "no"); + pos += ts_addbuf(pos, "External Reset", "%s", + sbcinfo->external_reset ? "yes" : "no"); + + if (sbcinfo->jumpers) { + pos += ts_addbuf(pos, "JPS", "%s%s%s%s%s%s", + sbcinfo->jumpers & 0x02 ? "JP1 " : "", + sbcinfo->jumpers & 0x04 ? "JP2 " : "", + sbcinfo->jumpers & 0x08 ? "JP3 " : "", + sbcinfo->jumpers & 0x10 ? "JP4 " : "", + sbcinfo->jumpers & 0x20 ? "JP5 " : "", + sbcinfo->jumpers & 0x80 ? + (sbcinfo->board_id == 5300 ? "JP8" : "JP6") + : ""); + } + + return pos - buf; +} + +/** + * ts_sbcinfo_proc_read() - function called when a read access is done on + * /proc/ts-sbcinfo + */ +static int ts_sbcinfo_proc_read(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + int to_copy = (procfs_buffer_size <= count) ? + procfs_buffer_size - off : count; + + if (off + to_copy >= procfs_buffer_size) { + to_copy = procfs_buffer_size - off; + *eof = 1; + } + + if (to_copy <= 0) + return 0; + + *start = page + off; + memcpy(*start, procfs_buffer + off, to_copy); + + return to_copy; +} + +static int __init ts5xxx_sbcinfo_init(void) +{ + int err; + + err = ts_sbcinfo_detect(&ts_sbcinfo); + if (err < 0) { + printk(KERN_ERR KBUILD_MODNAME + ": Failed to get SBC information\n"); + return err; + } + + proc_entry = create_proc_read_entry(PROCFS_NAME, S_IRUGO, NULL, + ts_sbcinfo_proc_read, 0); + if (proc_entry == NULL) { + printk(KERN_ERR KBUILD_MODNAME + ": Failed to create proc entry\n"); + return -ENOMEM; + } + + procfs_buffer_size = ts_sbcinfo_init_buffer(procfs_buffer, &ts_sbcinfo); + printk(KBUILD_MODNAME ": TS SBC's info driver loaded.\n"); + + return 0; +} +postcore_initcall(ts5xxx_sbcinfo_init); + +static void __exit ts5xxx_sbcinfo_exit(void) +{ + remove_proc_entry(proc_entry->name, proc_entry->parent); + proc_entry = NULL; +} +module_exit(ts5xxx_sbcinfo_exit); + +MODULE_AUTHOR("Jonas Fonseca <jonas.fonseca@xxxxxxxxxxxxxxxxxxxx>"); +MODULE_AUTHOR("Alexandre Savard <alexandre.savard@xxxxxxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("Technologic Systems SingleBoardComputer /proc driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/ts5xxx-sbcinfo.h b/include/linux/ts5xxx-sbcinfo.h new file mode 100644 index 0000000..0240e5c --- /dev/null +++ b/include/linux/ts5xxx-sbcinfo.h @@ -0,0 +1,42 @@ +/* + * Technologic Systems TS-5xxx boards - SBC info layer + * + * Copyright (c) 2010 Savoir-faire Linux Inc. + * Alexandre Savard <alexandre.savard@xxxxxxxxxxxxxxxxxxxx> + * + * Portions originate from ts_sbcinfo.h (c) Technologic Systems + * Liberty Young <liberty@xxxxxxxxxxxxxxx> + */ + +#ifndef _LINUX_TS5XXX_SBCINFO_H +#define _LINUX_TS5XXX_SBCINFO_H + +/** + * struct ts5xxx_sbcinfo - Describes the SBC and options installed + * @board_id: Board name. + * @jumpers: Connected jumpers. + * @rs485: Flag to indicate the existence of RS485. + * @adc: Analogic to digital converter? + * @rs422: RS422 available? + * @ethernet: Ethernet port available? + * @auto485: Auto 485 available? + * @external_reset: External reset available? + * @sram: Presence of SRAM available? + * @industrial: Industrial temperature. + */ +struct ts5xxx_sbcinfo { + int board_id; + u8 jumpers; + bool rs485; + bool adc; + bool rs422; + bool ethernet; + bool auto485; + bool external_reset; + bool sram; + bool industrial; +}; + +extern void ts5xxx_sbcinfo_set(struct ts5xxx_sbcinfo *sbcinfo); + +#endif -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
