From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/h8300/kernel/gpio.c | 174 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+) create mode 100644 arch/h8300/kernel/gpio.c (limited to 'arch/h8300/kernel/gpio.c') diff --git a/arch/h8300/kernel/gpio.c b/arch/h8300/kernel/gpio.c new file mode 100644 index 00000000000..795682b873e --- /dev/null +++ b/arch/h8300/kernel/gpio.c @@ -0,0 +1,174 @@ +/* + * linux/arch/h8300/kernel/gpio.c + * + * Yoshinori Sato + * + */ + +/* + * Internal I/O Port Management + */ + +#include +#include +#include +#include +#include +#include +#include + +#define _(addr) (volatile unsigned char *)(addr) +#if defined(CONFIG_H83007) || defined(CONFIG_H83068) +#include +static volatile unsigned char *ddrs[] = { + _(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR), + NULL, _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR), +}; +#define MAX_PORT 11 +#endif + + #if defined(CONFIG_H83002) || defined(CONFIG_H8048) +/* Fix me!! */ +#include +static volatile unsigned char *ddrs[] = { + _(P1DDR),_(P2DDR),_(P3DDR),_(P4DDR),_(P5DDR),_(P6DDR), + NULL, _(P8DDR),_(P9DDR),_(PADDR),_(PBDDR), +}; +#define MAX_PORT 11 +#endif + +#if defined(CONFIG_H8S2678) +#include +static volatile unsigned char *ddrs[] = { + _(P1DDR),_(P2DDR),_(P3DDR),NULL ,_(P5DDR),_(P6DDR), + _(P7DDR),_(P8DDR),NULL, _(PADDR),_(PBDDR),_(PCDDR), + _(PDDDR),_(PEDDR),_(PFDDR),_(PGDDR),_(PHDDR), + _(PADDR),_(PBDDR),_(PCDDR),_(PDDDR),_(PEDDR),_(PFDDR), + _(PGDDR),_(PHDDR) +}; +#define MAX_PORT 17 +#endif +#undef _ + +#if !defined(P1DDR) +#error Unsuppoted CPU Selection +#endif + +static struct { + unsigned char used; + unsigned char ddr; +} gpio_regs[MAX_PORT]; + +extern char *_platform_gpio_table(int length); + +int h8300_reserved_gpio(int port, unsigned int bits) +{ + unsigned char *used; + + if (port < 0 || port >= MAX_PORT) + return -1; + used = &(gpio_regs[port].used); + if ((*used & bits) != 0) + return 0; + *used |= bits; + return 1; +} + +int h8300_free_gpio(int port, unsigned int bits) +{ + unsigned char *used; + + if (port < 0 || port >= MAX_PORT) + return -1; + used = &(gpio_regs[port].used); + if ((*used & bits) != bits) + return 0; + *used &= (~bits); + return 1; +} + +int h8300_set_gpio_dir(int port_bit,int dir) +{ + int port = (port_bit >> 8) & 0xff; + int bit = port_bit & 0xff; + + if (ddrs[port] == NULL) + return 0; + if (gpio_regs[port].used & bit) { + if (dir) + gpio_regs[port].ddr |= bit; + else + gpio_regs[port].ddr &= ~bit; + *ddrs[port] = gpio_regs[port].ddr; + return 1; + } else + return 0; +} + +int h8300_get_gpio_dir(int port_bit) +{ + int port = (port_bit >> 8) & 0xff; + int bit = port_bit & 0xff; + + if (ddrs[port] == NULL) + return 0; + if (gpio_regs[port].used & bit) { + return (gpio_regs[port].ddr & bit) != 0; + } else + return -1; +} + +#if defined(CONFIG_PROC_FS) +static char *port_status(int portno) +{ + static char result[10]; + const static char io[2]={'I','O'}; + char *rp; + int c; + unsigned char used,ddr; + + used = gpio_regs[portno].used; + ddr = gpio_regs[portno].ddr; + result[8]='\0'; + rp = result + 7; + for (c = 8; c > 0; c--,rp--,used >>= 1, ddr >>= 1) + if (used & 0x01) + *rp = io[ ddr & 0x01]; + else + *rp = '-'; + return result; +} + +static int gpio_proc_read(char *buf, char **start, off_t offset, + int len, int *unused_i, void *unused_v) +{ + int c,outlen; + const static char port_name[]="123456789ABCDEFGH"; + outlen = 0; + for (c = 0; c < MAX_PORT; c++) { + if (ddrs[c] == NULL) + continue ; + len = sprintf(buf,"P%c: %s\n",port_name[c],port_status(c)); + buf += len; + outlen += len; + } + return outlen; +} + +static __init int register_proc(void) +{ + struct proc_dir_entry *proc_gpio; + + proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL); + if (proc_gpio) + proc_gpio->read_proc = gpio_proc_read; + return proc_gpio != NULL; +} + +__initcall(register_proc); +#endif + +void __init h8300_gpio_init(void) +{ + memcpy(gpio_regs,_platform_gpio_table(sizeof(gpio_regs)),sizeof(gpio_regs)); +} -- cgit v1.2.3