diff options
| -rw-r--r-- | AUTHORS | 3 | ||||
| -rw-r--r-- | COPYING | 340 | ||||
| -rw-r--r-- | ChangeLog | 1 | ||||
| -rw-r--r-- | Makefile | 5 | ||||
| -rw-r--r-- | NEWS | 0 | ||||
| -rw-r--r-- | README | 16 | ||||
| -rw-r--r-- | mtac_gpiob.c | 809 |
7 files changed, 1174 insertions, 0 deletions
@@ -0,0 +1,3 @@ +James Maki <jmaki@multitech.com> +John Klug <john.klug@multitech.com> + @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. 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To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + 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. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/ChangeLog @@ -0,0 +1 @@ + diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..204977d --- /dev/null +++ b/Makefile @@ -0,0 +1,5 @@ +obj-m := mtac_gpiob.o + +clean: + rm -f *.ko *.o + @@ -0,0 +1,16 @@ +This kernel module creates the +/sys/devices/platform/mts-io enumeration +of the features for MTAC GPIO boards. + +This driver requires the mtac.ko driver +loaded first. depmod should take care +of this. + +Documentation for this board is here: + +http://www.multitech.net/developer/software/mlinux/using-mlinux/mlinux-using-accessory-cards/mtac-gpio-usage/ + +An init script can look in: +/lib/modules/$(uname -r)/extra/mtac_gpiob.ko + +to find the driver. diff --git a/mtac_gpiob.c b/mtac_gpiob.c new file mode 100644 index 0000000..69e7388 --- /dev/null +++ b/mtac_gpiob.c @@ -0,0 +1,809 @@ +#define DRIVER_VERSION "v1.0.0" +#define DRIVER_AUTHOR "John Klug <john.klug@multitech.com>" +#define DRIVER_DESC "MTS General Purpose I/O Accessory Card" +#define DRIVER_NAME "mtac-gpiob" + +#include <linux/types.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> +#include <linux/kmod.h> +#include <linux/bitops.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/mtac.h> +#include <linux/mts_io.h> + +static struct gpio_pin gpio_pins_mtcdt_mtac_gpiob[] = { + // gpio pins for Accessory Card 1 + { + .name = "AP1_RESET", + .pin = { + .gpio = AT91_PIN_PB12, + .flags = GPIOF_OUT_INIT_HIGH, + .label = "ap1-reset", + } + }, + { + .name = "AP1_GPIO1", + .pin = { + .gpio = AT91_PIN_PC6, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap1-gpio1", + }, + .active_low = 1, + }, + { + .name = "AP1_GPIO2", + .pin = { + .gpio = AT91_PIN_PC7, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap1-gpio2", + } + }, + { + .name = "AP1_GPIO3", + .pin = { + .gpio = AT91_PIN_PC8, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap1-gpio3", + } + }, + { + .name = "AP1_GPIO4", + .pin = { + .gpio = AT91_PIN_PC9, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap1-gpio4", + } + }, + { + .name = "AP1_INTERRUPT1", + .pin = { + .gpio = AT91_PIN_PB14, + .flags = GPIOF_IN, + .label = "ap1-interrupt1", + } + }, + { + .name = "AP1_INTERRUPT2", + .pin = { + .gpio = AT91_PIN_PB15, + .flags = GPIOF_IN, + .label = "ap1-interrupt2", + } + }, + { + .name = "AP1_GPS_PPS", + .pin = { + .gpio = AT91_PIN_PA29, + .flags = GPIOF_IN, + .label = "ap1-gps-pps", + } + }, + + // gpio pins for Accessory Card 2 + { + .name = "AP2_RESET", + .pin = { + .gpio = AT91_PIN_PB13, + .flags = GPIOF_OUT_INIT_HIGH, + .label = "ap2-reset", + } + }, + { + .name = "AP2_GPIO1", + .pin = { + .gpio = AT91_PIN_PC20, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap2-gpio1", + }, + .active_low = 1, + }, + { + .name = "AP2_GPIO2", + .pin = { + .gpio = AT91_PIN_PC21, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap2-gpio2", + } + }, + { + .name = "AP2_GPIO3", + .pin = { + .gpio = AT91_PIN_PC22, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap2-gpio3", + } + }, + { + .name = "AP2_GPIO4", + .pin = { + .gpio = AT91_PIN_PC23, + .flags = GPIOF_OUT_INIT_LOW, + .label = "ap2-gpio4", + } + }, + { + .name = "AP2_INTERRUPT1", + .pin = { + .gpio = AT91_PIN_PB17, + .flags = GPIOF_IN, + .label = "ap2-interrupt1", + } + }, + { + .name = "AP2_INTERRUPT2", + .pin = { + .gpio = AT91_PIN_PB18, + .flags = GPIOF_IN, + .label = "ap2-interrupt2", + } + }, + { + .name = "AP2_GPS_PPS", + .pin = { + .gpio = AT91_PIN_PA6, + .flags = GPIOF_IN, + .label = "ap2-gps-pps", + } + }, + + { }, +}; + +enum spi_devices { + din = 0, + dout = 1, + adc = 2, +}; + +struct spi_device *gpiob_spi[NUM_AP][3]; +struct spi_driver gpiob_spi_drivers[NUM_AP][3]; + +static u8 spi_ap_dout_value[NUM_AP]; +static DEFINE_MUTEX(spi_ap_dout_mutex); +static unsigned int ap_dout_max_speed_hz = 1 * 1000 * 1000; +module_param(ap_dout_max_speed_hz, uint, S_IRUGO); +MODULE_PARM_DESC( + ap_dout_max_speed_hz, + "Maximum clock rate to be used with this device (default: 1 MHz)" +); + +static unsigned int ap_din_max_speed_hz = 1 * 1000 * 1000; +module_param(ap_din_max_speed_hz, uint, S_IRUGO); +MODULE_PARM_DESC( + ap_din_max_speed_hz, + "Maximum clock rate to be used with this device (default: 1 MHz)" +); + +static unsigned int ap_adc_max_speed_hz = 20 * 1000 * 1000; +module_param(ap_adc_max_speed_hz, uint, S_IRUGO); +MODULE_PARM_DESC( + ap_adc_max_speed_hz, + "Maximum clock rate to be used with this device (default: 20 MHz)" +); + +static bool gpiob_get_dev_info_from_modalias(const char* modalias, int* port, char* buf) { + sscanf(modalias, "mts-io-ap%d-%s", port, buf); + + return true; +} + +/* Generic SPI functions */ +static inline int spi_writen(struct spi_device *spi, const u8 *buf, size_t len) +{ + int tmp; + u8 *tx; + + tx = kmalloc(len, GFP_KERNEL); + if (!tx) { + return -ENOMEM; + } + + memcpy(tx, buf, len); + tmp = spi_write(spi, tx, len); + + kfree(tx); + + return tmp; +} + +static inline int spi_readn(struct spi_device *spi, u8 *buf, size_t len) +{ + int tmp; + u8 *rx; + + rx = kmalloc(len, GFP_KERNEL); + if (!rx) { + return -ENOMEM; + } + + tmp = spi_read(spi, rx, len); + memcpy(buf, rx, len); + + kfree(rx); + + return tmp; +} + +static int mts_spi_ap_probe(struct spi_device *spi) +{ + int tmp; + int port; + int port_index; + char buf[16]; + enum spi_devices dev; + + gpiob_get_dev_info_from_modalias(spi->modalias, &port, buf); + port_index = port - 1; + if (port < 1 || port > NUM_AP) { + log_error("port %d is invalid", port); + return -ENODEV; + } + + if (strstr(buf, "dout")) { + dev = dout; + spi->max_speed_hz = ap_dout_max_speed_hz; + spi->mode = 0; + } else if (strstr(buf, "din")) { + dev = din; + spi->max_speed_hz = ap_din_max_speed_hz; + spi->mode = SPI_CPOL; + } else if (strstr(buf, "adc")) { + dev = adc; + spi->max_speed_hz = ap_adc_max_speed_hz; + spi->mode = 0; + } else { + log_error("unknown gpiob spi device type [%s]", buf); + return -ENODEV; + } + + gpiob_spi[port_index][dev] = spi; + + tmp = spi_setup(gpiob_spi[port_index][dev]); + if (tmp < 0) { + log_error("spi_setup ap %d [%s] failed", port, buf); + return tmp; + } + + if (dev == dout) { + spi_ap_dout_value[port_index] = 0x00; + spi_writen(gpiob_spi[port_index][dev], &spi_ap_dout_value[port_index], 1); + } + + return 0; +} + +static int mts_spi_ap_remove(struct spi_device *spi) +{ + int port; + int port_index; + char buf[16]; + + gpiob_get_dev_info_from_modalias(spi->modalias, &port, buf); + port_index = port - 1; + if (port < 1 || port > NUM_AP) { + log_error("port %d is invalid", port); + return -ENODEV; + } + + if (strstr(buf, "dout")) { + gpiob_spi[port_index][dout] = NULL; + } else if (strstr(buf, "din")) { + gpiob_spi[port_index][din] = NULL; + } else if (strstr(buf, "adc")) { + gpiob_spi[port_index][adc] = NULL; + } else { + log_error("unknown gpiob spi device type [%s]", buf); + return -ENODEV; + } + + return 0; +} + +static char* gpiob_gpio_pin_name_by_attr_name(const char* name, int port) { + switch (port) { + case port_1: + if (! strcmp(name, "led1")) { + return "ap1-gpio3"; + } else if (! strcmp(name, "led2")) { + return "ap1-gpio4"; + } else if (! strcmp(name, "dout-enable")) { + return "ap1-gpio1"; + } else if (! strcmp(name, "reset")) { + return "ap1-reset"; + } else { + log_error("attribute name [%s] is invalid for GPIOB in port %d", name, port); + return ""; + } + + case port_2: + if (! strcmp(name, "led1")) { + return "ap2-gpio3"; + } else if (! strcmp(name, "led2")) { + return "ap2-gpio4"; + } else if (! strcmp(name, "dout-enable")) { + return "ap2-gpio1"; + } else if (! strcmp(name, "reset")) { + return "ap2-reset"; + } else { + log_error("attribute name [%s] is invalid for GPIOB in port %d", name, port); + return ""; + } + } + log_error("gpiob: Invalid port number"); + return ""; +} + +static ssize_t mts_attr_show_ap_din(struct kobject *kobj, struct kobj_attribute *attr, char *buf) +{ + int tmp; + int channel; + int port; + int port_index; + u8 bit; + u8 byte; + + sscanf(attr->attr.name, "din%d", &channel); + if (channel < 0 || channel > 3) { + log_error("channel %d is invalid", channel); + return -ENOENT; + } + + port = mtac_port_from_kobject(kobj); + if (port < 0) { + log_error("mtac_port_from_kobject returned %d", port); + return -EINVAL; + } + port_index = port - 1; + + bit = BIT(channel); + + tmp = spi_readn(gpiob_spi[port_index][din], &byte, 1); + if (tmp) { + log_error("spi_read failed %d", tmp); + return tmp; + } + + tmp = byte & bit ? 1 : 0; + + return sprintf(buf, "%d\n", tmp); +} + +static ssize_t mts_attr_store_ap_dout(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count) +{ + int value; + int channel; + int port; + int port_index; + u8 bit; + + sscanf(attr->attr.name, "dout%d", &channel); + if (channel < 0 || channel > 3) { + log_error("channel %d is invalid", channel); + return -ENOENT; + } + + port = mtac_port_from_kobject(kobj); + if (port < 0) { + log_error("mtac_port_from_kobject returned %d", port); + return -EINVAL; + } + port_index = port - 1; + + bit = BIT(channel); + + if (sscanf(buf, "%i", &value) != 1) { + log_error("accessory card dout attr invalid argument %d", value); + return -EINVAL; + } + + mutex_lock(&spi_ap_dout_mutex); + + if (value) { + spi_ap_dout_value[port_index] &= ~bit; + } else { + spi_ap_dout_value[port_index] |= bit; + } + + spi_writen(gpiob_spi[port_index][dout], &spi_ap_dout_value[port_index], 1); + + mutex_unlock(&spi_ap_dout_mutex); + + return count; +} + +static ssize_t mts_attr_show_ap_dout(struct kobject *kobj, struct kobj_attribute *attr, char *buf) +{ + int value; + int channel; + int port; + int port_index; + u8 bit; + + sscanf(attr->attr.name, "dout%d", &channel); + if (channel < 0 || channel > 3) { + log_error("channel %d is invalid", channel); + return -ENOENT; + } + + port = mtac_port_from_kobject(kobj); + if (port < 0) { + log_error("mtac_port_from_kobject returned %d", port); + return -EINVAL; + } + port_index = port - 1; + + bit = BIT(channel); + + mutex_lock(&spi_ap_dout_mutex); + + value = spi_ap_dout_value[port_index] & bit ? 0 : 1; + + mutex_unlock(&spi_ap_dout_mutex); + + return sprintf(buf, "%d\n", value); +} + +static ssize_t mts_attr_show_ap_adc(struct kobject *kobj, struct kobj_attribute *attr, char *buf) +{ + int tmp; + int tx_data; + int rx_data; + int channel; + int port; + int port_index; + int channel_mask = 0x0180; /* 0b 0000 0001 1000 0000 */ + int manual_mode = 0x1840; /* 0b 0001 1000 0100 0000 */ + uint8_t tx[2]; + uint8_t rx[2]; + + memset(tx, 0, sizeof(tx)); + memset(rx, 0, sizeof(rx)); + + sscanf(attr->attr.name, "adc%d", &channel); + if (channel < 0 || channel > 2) { + log_error("channel %d is invalid", channel); + return -ENOENT; + } + + port = mtac_port_from_kobject(kobj); + if (port < 0) { + log_error("mtac_port_from_kobject returned %d", port); + return -EINVAL; + } + port_index = port - 1; + + /* 1st transfer to set up (5V reference, channel to read from) */ + tx_data = manual_mode | ((channel << 7) & channel_mask); + tx[0] = tx_data >> 8; + tx[1] = tx_data & 0xFF; + tmp = spi_writen(gpiob_spi[port_index][adc], tx, 2); + if (tmp) { + log_error("spi_write failed %d", tmp); + return tmp; + } + + /* 2nd transfer to clock chip for ADC conversion + * this can be a throw-away read or an empty write, + * the ADC just needs the clock running so it can convert */ + tx[0] = 0; + tx[1] = 0; + tmp = spi_writen(gpiob_spi[port_index][adc], tx, 2); + if (tmp) { + log_error("2nd spi_write failed %d", tmp); + return tmp; + } + + /* 3rd transfer to read data */ + tmp = spi_readn(gpiob_spi[port_index][adc], rx, 2); + if (tmp) { + log_error("spi_read failed %d", tmp); + return tmp; + } + rx_data = ((rx[0] & 0x0F) << 8) | (rx[1] & 0xFF); + + return sprintf(buf, "%lu\n", (unsigned long) rx_data); +} + +static bool gpiob_spi_driver_setup(struct spi_driver *driver, const char *driver_name) { + char* name = kstrdup(driver_name, GFP_KERNEL); + if (! name) { + log_error("GFP_KERNEL dup failed for driver [%s]", driver_name); + return false; + } + driver->driver.name = name; + driver->driver.bus = &spi_bus_type; + driver->driver.owner = THIS_MODULE; + driver->probe = mts_spi_ap_probe; + driver->remove = mts_spi_ap_remove; + + return true; +} + +// 4 digital inputs +// 4 digital outputs +// 3 analog to digital +// 2 LEDs +// 1 digital out enable +// 1 reset +// 1 vendor-id +// 1 product-id +// 1 device-id +// 1 hw-version +// NULL +static int ap_gpiob_attrs_size = 20; + +static bool gpiob_setup(enum ap port) { + int i; + int port_index = port - 1; + int index = 0; + int count = 0; + int ret; + char buf[32]; + struct kobj_attribute* attr; + struct attribute **attrs; + struct kobject *subdir; + + log_info("loading GPIOB accessory card in port %d", port); + + sprintf(buf, "ap%d", port); + subdir = kobject_create_and_add(buf, &mts_io_platform_device->dev.kobj); + if (! subdir) { + log_error("kobject_create_and_add for port %d failed", port); + return false; + } + + mtac_set_port_pins(port_index,gpio_pins_mtcdt_mtac_gpiob,subdir); + + // create the link to the apX directory this card is in + // if we're in the first slot, we get plain "gpiob" + // if we're in a different slot, we might need to use "gpiob-2" to differentiate + if (port > 1) { + for (i = 1; i < port; i++) { + if (mtac_port_info[i - 1]) { + if (strstr(mtac_port_info[i - 1]->product_id, PRODUCT_ID_MTAC_GPIOB)) { + count++; + } + } + } + } + if (count > 0) { + sprintf(buf, "gpiob-%d", count + 1); + } else { + sprintf(buf, "gpiob"); + } + ret = sysfs_create_link(mtac_port_info[port_index]->subdirs->parent, mtac_port_info[port_index]->subdirs, buf); + if (ret) { + log_error("failed to link [%s] to [%s], %d", buf, mtac_port_info[port_index]->subdirs->name, ret); + } + + attrs = kzalloc(sizeof(struct attribute*) * ap_gpiob_attrs_size, GFP_KERNEL); + if (! attrs) { + log_error("failed to allocate attribute space for port %d", port); + return false; + } + + // add digital inputs + for (i = 0; i < 4; i++) { + sprintf(buf, "din%d", i); + attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO); + if (! attr) { + log_error("failed to create attribute [%s]", buf); + return false; + } + attr->show = mts_attr_show_ap_din; + attrs[index++] = &attr->attr; + } + + // add digital outputs + for (i = 0; i < 4; i++) { + sprintf(buf, "dout%d", i); + attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW); + if (! attr) { + log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port); + return false; + } + attr->show = mts_attr_show_ap_dout; + attr->store = mts_attr_store_ap_dout; + attrs[index++] = &attr->attr; + } + + // add analog to digital + for (i = 0; i < 3; i++) { + sprintf(buf, "adc%d", i); + attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RO); + if (! attr) { + log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port); + return false; + } + attr->show = mts_attr_show_ap_adc; + attrs[index++] = &attr->attr; + } + + // add LEDs + for (i = 1; i <= 2; i++) { + sprintf(buf, "led%d", i); + attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW); + if (! attr) { + log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port); + return false; + } + attr->show = mtac_attr_show_ap_gpio_pin; + attr->store = mtac_attr_store_ap_gpio_pin; + attrs[index++] = &attr->attr; + } + + // add misc attributes + sprintf(buf, "dout-enable"); + attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW); + if (! attr) { + log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port); + return false; + } + attr->show = mtac_attr_show_ap_gpio_pin; + attr->store = mtac_attr_store_ap_gpio_pin; + attrs[index++] = &attr->attr; + + sprintf(buf, "reset"); + attr = mtac_create_attribute(buf, MTS_ATTR_MODE_RW); + if (! attr) { + log_error("failed to create attribute [%s] for GPIOB in port %d", buf, port); + return false; + } + attr->show = mtac_attr_show_ap_gpio_pin; + attr->store = mtac_attr_store_ap_gpio_pin; + attrs[index++] = &attr->attr; + + // add attributes for eeprom contents + if (! mtac_add_product_info_attributes(port, attrs, &index)) { + log_error("failed to add product info attributes for GPIOB in port %d", port); + return false; + } + + attrs[index] = NULL; + + mtac_port_info[port_index]->attr_group.attrs = attrs; + + // setup and register drivers + log_debug("registering accessory card %d dout driver", port); + sprintf(buf, "mts-io-ap%d-dout", port); + if (! gpiob_spi_driver_setup(&gpiob_spi_drivers[port_index][dout], buf)) { + log_error("failed to set up spi driver [%s] for GPIOB in port %d", buf, port); + return false; + } + if (spi_register_driver(&gpiob_spi_drivers[port_index][dout])) { + log_error("failed to register accessory card %d dout driver", port); + spi_unregister_driver(&gpiob_spi_drivers[port_index][dout]); + return false; + } + + log_debug("registering accessory card %d din driver", port); + sprintf(buf, "mts-io-ap%d-din", port); + if (! gpiob_spi_driver_setup(&gpiob_spi_drivers[port_index][din], buf)) { + log_error("failed to set up spi driver [%s] for GPIOB in port %d", buf, port); + return false; + } + if (spi_register_driver(&gpiob_spi_drivers[port_index][din])) { + log_error("failed to register accessory card %d din driver", port); + spi_unregister_driver(&gpiob_spi_drivers[port_index][din]); + return false; + } + + log_debug("registering accessory card %d adc driver", port); + sprintf(buf, "mts-io-ap%d-adc", port); + if (! gpiob_spi_driver_setup(&gpiob_spi_drivers[port_index][adc], buf)) { + log_error("failed to set up spi driver [%s] for GPIOB in port %d", buf, port); + return false; + } + if (spi_register_driver(&gpiob_spi_drivers[port_index][adc])) { + log_error("failed to register accessory card %d adc driver", port); + spi_unregister_driver(&gpiob_spi_drivers[port_index][adc]); + return false; + } + + if (sysfs_create_group(mtac_port_info[port_index]->subdirs, &mtac_port_info[port_index]->attr_group)) { + log_error("sysfs_create_group failed for GPIOB in port %d", port); + return false; + } + + return true; +} + +static bool gpiob_teardown(enum ap port) { + int i; + int port_index = port - 1; + struct attribute **attrs = mtac_port_info[port_index]->attr_group.attrs; + + log_info("unloading GPIOB accessory card in port %d", port); + + // clean up allocated memory for attributes + for (i = 0; i < ap_gpiob_attrs_size; i++) { + if (attrs[i]) { + if (attrs[i]->name) + kfree(attrs[i]->name); + + kfree(attrs[i]); + } + } + + kfree(attrs); + + // clean up our "apX/" kobject if it exists + if (mtac_port_info[port_index]->subdirs) { + kobject_put(mtac_port_info[port_index]->subdirs); + } + + // clean up allocated memory for SPI drivers + if (gpiob_spi_drivers[port_index][dout].driver.name) + kfree(gpiob_spi_drivers[port_index][dout].driver.name); + if (gpiob_spi_drivers[port_index][din].driver.name) + kfree(gpiob_spi_drivers[port_index][din].driver.name); + if (gpiob_spi_drivers[port_index][adc].driver.name) + kfree(gpiob_spi_drivers[port_index][adc].driver.name); + + // unregister SPI drivers + spi_unregister_driver(&gpiob_spi_drivers[port_index][dout]); + spi_unregister_driver(&gpiob_spi_drivers[port_index][din]); + spi_unregister_driver(&gpiob_spi_drivers[port_index][adc]); + mtac_clear_port_pins(port_index); + return true; +} + +bool set_gpiob_info(struct ap_info* info) { + snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_GPIOB); + info->setup = &gpiob_setup; + info->teardown = &gpiob_teardown; + info->gpio_pin_name_by_attr_name = &gpiob_gpio_pin_name_by_attr_name; + + return true; +} + +/* + * Loop through all the slots, and set up the + * mtac-gpiob driver for all slots. + */ +static int __init mtac_gpiob_init(void) +{ + int slot_count = 0; + + slot_count = mtac_find(set_gpiob_info,PRODUCT_ID_MTAC_GPIOB); + + if (slot_count < 1) { + log_debug("No MTAC GPIOB found"); + if (slot_count < 0) + return slot_count; + else + return -ENXIO; + + } + + return 0; +} + +/* We can only tear down our own device */ +static void __exit mtac_gpiob_exit(void) +{ + int port_index; + struct mts_ap_eeprom_layout *app; + + for (port_index = 0; port_index < NUM_AP; port_index++) { + app = (struct mts_ap_eeprom_layout *)mts_ap_eeprom[port_index]; + if (app && strstr(app->product_id, PRODUCT_ID_MTAC_GPIOB)) { + if (mtac_port_info[port_index]->setup == &gpiob_setup) { + mtac_port_info[port_index]->teardown(port_index+1); + kfree(mtac_port_info[port_index]); + } + } + } + log_info("exiting"); +} + +module_init(mtac_gpiob_init); +module_exit(mtac_gpiob_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL"); |