Add base support for TS-5500 in arch/x86/platform/ts5500 and documentation in Documentation/ABI/testing/sysfs-platform-ts5500.
Signed-off-by: Vivien Didelot <[email protected]> --- Documentation/ABI/testing/sysfs-platform-ts5500 | 46 ++++ MAINTAINERS | 7 + arch/x86/Kconfig | 2 + arch/x86/platform/Makefile | 1 + arch/x86/platform/ts5500/Kconfig | 7 + arch/x86/platform/ts5500/Makefile | 1 + arch/x86/platform/ts5500/ts5500.c | 296 +++++++++++++++++++++++ 7 files changed, 360 insertions(+), 0 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-platform-ts5500 create mode 100644 arch/x86/platform/ts5500/Kconfig create mode 100644 arch/x86/platform/ts5500/Makefile create mode 100644 arch/x86/platform/ts5500/ts5500.c diff --git a/Documentation/ABI/testing/sysfs-platform-ts5500 b/Documentation/ABI/testing/sysfs-platform-ts5500 new file mode 100644 index 0000000..c870564 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-ts5500 @@ -0,0 +1,46 @@ +What: /sys/devices/platform/ts5500/id +Date: July 2011 +KernelVersion: 2.6.39 +Contact: "Savoir-faire Linux, Inc." <[email protected]> +Description: + Product ID of the TS board. TS-5500 ID is 0x60. + +What: /sys/devices/platform/ts5500/sram +Date: July 2011 +KernelVersion: 2.6.39 +Contact: "Savoir-faire Linux, Inc." <[email protected]> +Description: + Say if the SRAM feature is present. If it is enabled, it will + display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/ereset +Date: July 2011 +KernelVersion: 2.6.39 +Contact: "Savoir-faire Linux, Inc." <[email protected]> +Description: + Say if an external reset is present. If it is present, it will + display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/jp{1,2,3,4,5,6} +Date: July 2011 +KernelVersion: 2.6.39 +Contact: "Savoir-faire Linux, Inc." <[email protected]> +Description: + Show the state of a plugged jumper. If it is present, it will + display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/adc +Date: July 2011 +KernelVersion: 2.6.39 +Contact: "Savoir-faire Linux, Inc." <[email protected]> +Description: + Say if the Analogic to Digital Converter is present. If it is + enabled, it will display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/rs485 +Date: July 2011 +KernelVersion: 2.6.39 +Contact: "Savoir-faire Linux, Inc." <[email protected]> +Description: + Say if the RS485 feature is present. If it is enabled, it + will display "1", otherwise "0". \ No newline at end of file diff --git a/MAINTAINERS b/MAINTAINERS index 187282d..be8ce4b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6134,6 +6134,13 @@ 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. <[email protected]> +S: Maintained +F: arch/x86/platform/ts5500/Kconfig +F: arch/x86/platform/ts5500/Makefile +F: arch/x86/platform/ts5500/ts5500.c + TEGRA SUPPORT M: Colin Cross <[email protected]> M: Erik Gilling <[email protected]> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index da34972..cd4bf1a 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2079,6 +2079,8 @@ config OLPC_XO1 ---help--- Add support for non-essential features of the OLPC XO-1 laptop. +source "arch/x86/platform/ts5500/Kconfig" + endif # X86_32 config AMD_NB diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile index 021eee9..1bdc038 100644 --- a/arch/x86/platform/Makefile +++ b/arch/x86/platform/Makefile @@ -8,3 +8,4 @@ obj-y += scx200/ obj-y += sfi/ obj-y += visws/ obj-y += uv/ +obj-y += ts5500/ diff --git a/arch/x86/platform/ts5500/Kconfig b/arch/x86/platform/ts5500/Kconfig new file mode 100644 index 0000000..6428ca5 --- /dev/null +++ b/arch/x86/platform/ts5500/Kconfig @@ -0,0 +1,7 @@ +config TS5500 + bool "Technologic Systems TS-5500 Single Board Computer support" + depends on MELAN + help + Add support for the Technologic Systems TS-5500 platform features. + + If you have a TS-5500, say Y here. diff --git a/arch/x86/platform/ts5500/Makefile b/arch/x86/platform/ts5500/Makefile new file mode 100644 index 0000000..0a689a7 --- /dev/null +++ b/arch/x86/platform/ts5500/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_TS5500) += ts5500.o diff --git a/arch/x86/platform/ts5500/ts5500.c b/arch/x86/platform/ts5500/ts5500.c new file mode 100644 index 0000000..0135dbd --- /dev/null +++ b/arch/x86/platform/ts5500/ts5500.c @@ -0,0 +1,296 @@ +/* + * Technologic Systems TS-5500 board - SBC info layer + * + * Copyright (c) 2010-2011 Savoir-faire Linux Inc. + * Alexandre Savard <[email protected]> + * Jonas Fonseca <[email protected]> + * Vivien Didelot <[email protected]> + * + * Portions originate from ts_sbcinfo.c (c) Technologic Systems + * Liberty Young <[email protected]> + * + * These functions add sysfs platform entries to display information about + * the Technologic Systems TS-5500 Single Board Computer (SBC). + * + * For further information about sysfs entries, see + * Documentation/ABI/testing/sysfs-platform-ts5500 + */ + +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/mutex.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <asm/processor.h> + +/* Hardware info for pre-detection */ +#define AMD_ELAN_FAMILY 4 +#define AMD_ELAN_SC520 9 + +/* Product code register */ +#define TS5500_PRODUCT_CODE_REG 0x74 +#define TS5500_PRODUCT_CODE 0x60 /* TS-5500 product code */ + +/* SRAM/RS-485/ADC options, and RS-485 RTS/Automatic RS-485 flags register */ +#define TS5500_SRAM_RS485_ADC_REG 0x75 +#define TS5500_SRAM_OPT 0x01 /* SRAM option */ +#define TS5500_RS485_OPT 0x02 /* RS-485 option */ +#define TS5500_ADC_OPT 0x04 /* A/D converter option */ +#define TS5500_RS485_RTS_FLAG 0x40 /* RTS for RS-485 */ +#define TS5500_RS485_AUTO_FLAG 0x80 /* Automatic RS-485 */ + +/* External Reset/Industrial Temperature Range options register */ +#define TS5500_ERESET_ITR_REG 0x76 +#define TS5500_ERESET_OPT 0x01 /* External Reset option */ +#define TS5500_ITR_OPT 0x02 /* Indust. Temp. Range option */ + +/* LED/Jumpers register */ +#define TS5500_LED_JMPRS_REG 0x77 +#define TS5500_LED_FLAG 0x01 /* LED flag */ +#define TS5500_JP1 0x02 /* Automatic CMOS */ +#define TS5500_JP2 0x04 /* Enable Serial Console */ +#define TS5500_JP3 0x08 /* Write Enable Drive A */ +#define TS5500_JP4 0x10 /* Fast Console (115K baud) */ +#define TS5500_JP5 0x20 /* User Jumper */ +#define TS5500_JP6 0x40 /* Console on COM1 (req. JP2) */ +#define TS5500_JP7 0x80 /* Undocumented (Unused) */ + +/** + * struct ts5500_sbc - TS-5500 SBC main structure + * @lock: Read/Write mutex. + * @board_id: Board name. + * @sram: Check SRAM option. + * @rs485: Check RS-485 option. + * @adc: Check Analogic/Digital converter option. + * @ereset: Check External Reset option. + * @itr: Check Industrial Temperature Range option. + * @jumpers: States of jumpers 1-7. + */ +struct ts5500_sbc { + struct mutex lock; + int board_id; + bool sram; + bool rs485; + bool adc; + bool ereset; + bool itr; + u8 jumpers; +}; + +/* Current platform */ +struct ts5500_sbc *ts5500; + +/** + * ts5500_pre_detect() - check for TS-5500 specific features + * + * It is not safe to read ID register if we are not sure that it's a TS SBC. + * Since TS SBCs don't have DMI support, it is safer to check for a TS-5500 + * specific feature such as the processor. + */ +static int ts5500_pre_detect(void) +{ + /* Check for AMD ElanSC520 Microcontroller */ + if (!(cpu_info.x86_vendor == X86_VENDOR_AMD && + cpu_info.x86 == AMD_ELAN_FAMILY && + cpu_info.x86_model == AMD_ELAN_SC520)) + return -ENODEV; + + return 0; +} + +/** + * ts5500_detect_config() - detect the TS board + * @sbc: Structure where to store the detected board's details. + */ +static int ts5500_detect_config(struct ts5500_sbc *sbc) +{ + u8 tmp; + int ret = 0; + + if (!request_region(TS5500_PRODUCT_CODE_REG, 4, "ts5500")) + return -EBUSY; + + mutex_lock(&ts5500->lock); + tmp = inb(TS5500_PRODUCT_CODE_REG); + if (tmp != TS5500_PRODUCT_CODE) { + pr_err("This platform is not a TS-5500 (found ID 0x%x)\n", tmp); + ret = -ENODEV; + goto error; + } + sbc->board_id = tmp; + + tmp = inb(TS5500_SRAM_RS485_ADC_REG); + ts5500->sram = !!(tmp & TS5500_SRAM_OPT); + ts5500->rs485 = !!(tmp & TS5500_RS485_OPT); + ts5500->adc = !!(tmp & TS5500_ADC_OPT); + + tmp = inb(TS5500_ERESET_ITR_REG); + ts5500->ereset = !!(tmp & TS5500_ERESET_OPT); + ts5500->itr = !!(tmp & TS5500_ITR_OPT); + + tmp = inb(TS5500_LED_JMPRS_REG); + sbc->jumpers = tmp & 0xFE; /* All bits except the first (LED) */ + +error: + mutex_unlock(&ts5500->lock); + release_region(TS5500_PRODUCT_CODE_REG, 4); + return ret; +} + +#define TS5500_IS_JP_SET(sbc, jmp) (!!(sbc->jumpers & TS5500_JP##jmp)) + +static struct platform_device *ts5500_devices[] __initdata = { +}; + +static ssize_t ts5500_show_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); + + return sprintf(buf, "0x%x\n", sbc->board_id); +} + +static ssize_t ts5500_show_sram(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", sbc->sram); +} + +static ssize_t ts5500_show_rs485(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", sbc->rs485); +} + +static ssize_t ts5500_show_adc(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", sbc->adc); +} + +static ssize_t ts5500_show_ereset(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", sbc->ereset); +} + +static ssize_t ts5500_show_itr(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", sbc->itr); +} + +#define TS5500_SHOW_JP(jp) \ + static ssize_t ts5500_show_jp##jp(struct device *dev, \ + struct device_attribute *attr,\ + char *buf) \ + { \ + struct ts5500_sbc *sbc = dev_get_drvdata(dev); \ + return sprintf(buf, "%d\n", TS5500_IS_JP_SET(sbc, jp)); \ + } + +TS5500_SHOW_JP(1) +TS5500_SHOW_JP(2) +TS5500_SHOW_JP(3) +TS5500_SHOW_JP(4) +TS5500_SHOW_JP(5) +TS5500_SHOW_JP(6) + +static DEVICE_ATTR(id, S_IRUGO, ts5500_show_id, NULL); +static DEVICE_ATTR(sram, S_IRUGO, ts5500_show_sram, NULL); +static DEVICE_ATTR(rs485, S_IRUGO, ts5500_show_rs485, NULL); +static DEVICE_ATTR(adc, S_IRUGO, ts5500_show_adc, NULL); +static DEVICE_ATTR(ereset, S_IRUGO, ts5500_show_ereset, NULL); +static DEVICE_ATTR(itr, S_IRUGO, ts5500_show_itr, NULL); +static DEVICE_ATTR(jp1, S_IRUGO, ts5500_show_jp1, NULL); +static DEVICE_ATTR(jp2, S_IRUGO, ts5500_show_jp2, NULL); +static DEVICE_ATTR(jp3, S_IRUGO, ts5500_show_jp3, NULL); +static DEVICE_ATTR(jp4, S_IRUGO, ts5500_show_jp4, NULL); +static DEVICE_ATTR(jp5, S_IRUGO, ts5500_show_jp5, NULL); +static DEVICE_ATTR(jp6, S_IRUGO, ts5500_show_jp6, NULL); + +static struct attribute *ts5500_attributes[] = { + &dev_attr_id.attr, + &dev_attr_sram.attr, + &dev_attr_rs485.attr, + &dev_attr_adc.attr, + &dev_attr_ereset.attr, + &dev_attr_itr.attr, + &dev_attr_jp1.attr, + &dev_attr_jp2.attr, + &dev_attr_jp3.attr, + &dev_attr_jp4.attr, + &dev_attr_jp5.attr, + &dev_attr_jp6.attr, + NULL +}; + +static const struct attribute_group ts5500_attr_group = { + .attrs = ts5500_attributes +}; + +static int __init ts5500_init(void) +{ + int ret; + struct platform_device *pdev; + + /* Firstly, check specific TS-5500 hardware, such as CPU. */ + ret = ts5500_pre_detect(); + if (ret) + return ret; + + ts5500 = kzalloc(sizeof(struct ts5500_sbc), GFP_KERNEL); + if (!ts5500) + return -ENOMEM; + mutex_init(&ts5500->lock); + + ret = ts5500_detect_config(ts5500); + if (ret) + goto release_mem; + + pdev = platform_device_register_simple("ts5500", -1, NULL, 0); + if (IS_ERR(pdev)) { + ret = PTR_ERR(pdev); + goto release_mem; + } + platform_set_drvdata(pdev, ts5500); + + ret = platform_add_devices(ts5500_devices, ARRAY_SIZE(ts5500_devices)); + if (ret) + goto release_pdev; + + ret = sysfs_create_group(&pdev->dev.kobj, + &ts5500_attr_group); + if (ret) + goto release_pdev; + + return 0; + +release_pdev: + platform_device_unregister(pdev); +release_mem: + kfree(ts5500); + + return ret; +} +postcore_initcall(ts5500_init); + +MODULE_AUTHOR("Jonas Fonseca <[email protected]>"); +MODULE_AUTHOR("Alexandre Savard <[email protected]>"); +MODULE_AUTHOR("Vivien Didelot <[email protected]>"); +MODULE_DESCRIPTION("Technologic Systems TS-5500 Board's platform driver"); +MODULE_LICENSE("GPL"); -- 1.7.6 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
