diff options
Diffstat (limited to 'target/linux/package/switch/src/switch-adm.c')
| -rw-r--r-- | target/linux/package/switch/src/switch-adm.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/target/linux/package/switch/src/switch-adm.c b/target/linux/package/switch/src/switch-adm.c new file mode 100644 index 000000000..266ba0149 --- /dev/null +++ b/target/linux/package/switch/src/switch-adm.c @@ -0,0 +1,502 @@ +/* + * Broadcom BCM5325E/536x switch configuration module + * + * Copyright (C) 2005 Felix Fietkau <nbd@nbd.name> + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/if.h> +#include <linux/if_arp.h> +#include <linux/sockios.h> +#include <linux/delay.h> +#include <asm/uaccess.h> + +#include "gpio.h" +#include "switch-core.h" + +#define DRIVER_NAME "adm6996" + +static int eecs = 2; +static int eesk = 3; +static int eedi = 5; +static int eerc = 6; +static int force = 0; + +MODULE_AUTHOR("Felix Fietkau <openwrt@nbd.name>"); +MODULE_LICENSE("GPL"); +MODULE_PARM(eecs, "i"); +MODULE_PARM(eesk, "i"); +MODULE_PARM(eedi, "i"); +MODULE_PARM(eerc, "i"); +MODULE_PARM(force, "i"); + +/* Minimum timing constants */ +#define EECK_EDGE_TIME 3 /* 3us - max(adm 2.5us, 93c 1us) */ +#define EEDI_SETUP_TIME 1 /* 1us - max(adm 10ns, 93c 400ns) */ +#define EECS_SETUP_TIME 1 /* 1us - max(adm no, 93c 200ns) */ + +/* Handy macros for writing fixed length values */ +#define adm_write8(cs, b) { __u8 val = (__u8) (b); adm_write(cs, &val, sizeof(val)*8); } +#define adm_write16(cs, w) { __u16 val = hton16(w); adm_write(cs, (__u8 *)&val, sizeof(val)*8); } +#define adm_write32(cs, i) { uint32 val = hton32(i); adm_write(cs, (__u8 *)&val, sizeof(val)*8); } + + +extern int getintvar(char **vars, char *name); + + +static void adm_write(int cs, char *buf, unsigned int bits) +{ + int i, len = (bits + 7) / 8; + __u8 mask; + + gpioout(eecs, (cs ? eecs : 0)); + udelay(EECK_EDGE_TIME); + + /* Byte assemble from MSB to LSB */ + for (i = 0; i < len; i++) { + /* Bit bang from MSB to LSB */ + for (mask = 0x80; mask && bits > 0; mask >>= 1, bits --) { + /* Clock low */ + gpioout(eesk, 0); + udelay(EECK_EDGE_TIME); + + /* Output on rising edge */ + gpioout(eedi, ((mask & buf[i]) ? eedi : 0)); + udelay(EEDI_SETUP_TIME); + + /* Clock high */ + gpioout(eesk, eesk); + udelay(EECK_EDGE_TIME); + } + } + + /* Clock low */ + gpioout(eesk, 0); + udelay(EECK_EDGE_TIME); + + if (cs) + gpioout(eecs, 0); +} + + +static void adm_read(int cs, char *buf, unsigned int bits) +{ + int i, len = (bits + 7) / 8; + __u8 mask; + + gpioout(eecs, (cs ? eecs : 0)); + udelay(EECK_EDGE_TIME); + + /* Byte assemble from MSB to LSB */ + for (i = 0; i < len; i++) { + __u8 byte; + + /* Bit bang from MSB to LSB */ + for (mask = 0x80, byte = 0; mask && bits > 0; mask >>= 1, bits --) { + __u8 gp; + + /* Clock low */ + gpioout(eesk, 0); + udelay(EECK_EDGE_TIME); + + /* Input on rising edge */ + gp = gpioin(); + if (gp & eedi) + byte |= mask; + + /* Clock high */ + gpioout(eesk, eesk); + udelay(EECK_EDGE_TIME); + } + + *buf++ = byte; + } + + /* Clock low */ + gpioout(eesk, 0); + udelay(EECK_EDGE_TIME); + + if (cs) + gpioout(eecs, 0); +} + + +/* Enable outputs with specified value to the chip */ +static void adm_enout(__u8 pins, __u8 val) +{ + /* Prepare GPIO output value */ + gpioout(pins, val); + + /* Enable GPIO outputs */ + gpioouten(pins, pins); + udelay(EECK_EDGE_TIME); +} + + +/* Disable outputs to the chip */ +static void adm_disout(__u8 pins) +{ + /* Disable GPIO outputs */ + gpioouten(pins, 0); + udelay(EECK_EDGE_TIME); +} + + +/* Advance clock(s) */ +static void adm_adclk(int clocks) +{ + int i; + for (i = 0; i < clocks; i++) { + /* Clock high */ + gpioout(eesk, eesk); + udelay(EECK_EDGE_TIME); + + /* Clock low */ + gpioout(eesk, 0); + udelay(EECK_EDGE_TIME); + } +} + +static __u32 adm_rreg(__u8 table, __u8 addr) +{ + /* cmd: 01 10 T DD R RRRRRR */ + __u8 bits[6] = { + 0xFF, 0xFF, 0xFF, 0xFF, + (0x06 << 4) | ((table & 0x01) << 3 | (addr&64)>>6), + ((addr&62)<<2) + }; + + __u8 rbits[4]; + + /* Enable GPIO outputs with all pins to 0 */ + adm_enout((__u8)(eecs | eesk | eedi), 0); + + adm_write(0, bits, 46); + adm_disout((__u8)(eedi)); + adm_adclk(2); + adm_read (0, rbits, 32); + + /* Extra clock(s) required per datasheet */ + adm_adclk(2); + + /* Disable GPIO outputs */ + adm_disout((__u8)(eecs | eesk)); + + if (!table) /* EEPROM has 16-bit registers, but pumps out two registers in one request */ + return (addr & 0x01 ? (rbits[0]<<8) | rbits[1] : (rbits[2]<<8) | (rbits[3])); + else + return (rbits[0]<<24) | (rbits[1]<<16) | (rbits[2]<<8) | rbits[3]; +} + + + +/* Write chip configuration register */ +/* Follow 93c66 timing and chip's min EEPROM timing requirement */ +void +adm_wreg(__u8 addr, __u16 val) +{ + /* cmd(27bits): sb(1) + opc(01) + addr(bbbbbbbb) + data(bbbbbbbbbbbbbbbb) */ + __u8 bits[4] = { + (0x05 << 5) | (addr >> 3), + (addr << 5) | (__u8)(val >> 11), + (__u8)(val >> 3), + (__u8)(val << 5) + }; + + /* Enable GPIO outputs with all pins to 0 */ + adm_enout((__u8)(eecs | eesk | eedi), 0); + + /* Write cmd. Total 27 bits */ + adm_write(1, bits, 27); + + /* Extra clock(s) required per datasheet */ + adm_adclk(2); + + /* Disable GPIO outputs */ + adm_disout((__u8)(eecs | eesk | eedi)); +} + + +/* Port configuration registers */ +static int port_conf[] = { 0x01, 0x03, 0x05, 0x07, 0x08, 0x09 }; + +/* Bits in VLAN port mapping */ +static int vlan_ports[] = { 1 << 0, 1 << 2, 1 << 4, 1 << 6, 1 << 7, 1 << 8 }; + +static int handle_vlan_port_read(char *buf, int nr) +{ + int ports, i, c, len = 0; + + if ((nr < 0) || (nr > 15)) + return 0; + + /* Get VLAN port map */ + ports = adm_rreg(0, 0x13 + nr); + + for (i = 0; i <= 5; i++) { + if (ports & vlan_ports[i]) { + c = adm_rreg(0, port_conf[i]); + len += sprintf(buf + len, (c & (1 << 4) ? "%dt\t" : (i == 5 ? "%du\t" : "%d\t")), i); + } + } + len += sprintf(buf + len, "\n"); + + return len; +} + +static int handle_vlan_port_write(char *buf, int nr) +{ + int i, c, ports; + int map = switch_parse_vlan(buf); + + if (map == -1) + return -1; + + ports = adm_rreg(0, 0x13 + nr); + for (i = 0; i <= 5; i++) { + if (map & (1 << i)) { + ports |= vlan_ports[i]; + + c = adm_rreg(0, port_conf[i]); + + /* Tagging */ + if (map & (1 << (8 + i))) + c |= (1 << 4); + else + c &= ~(1 << 4); + + c = (c & ~(0xf << 10)) | (nr << 10); + + adm_wreg(port_conf[i], (__u16) c); + } else { + ports &= ~(vlan_ports[i]); + } + } + adm_wreg(0x13 + nr, (__u16) ports); + + return 0; +} + +static int handle_port_enable_read(char *buf, int nr) +{ + return sprintf(buf, "%d\n", ((adm_rreg(0, port_conf[nr]) & (1 << 5)) ? 0 : 1)); +} + +static int handle_port_enable_write(char *buf, int nr) +{ + int reg = adm_rreg(0, port_conf[nr]); + + if (buf[0] == '0') + reg |= (1 << 5); + else if (buf[0] == '1') + reg &= ~(1 << 5); + else return -1; + + adm_wreg(port_conf[nr], (__u16) reg); + return 0; +} + +static int handle_port_media_read(char *buf, int nr) +{ + int len; + int media = 0; + int reg = adm_rreg(0, port_conf[nr]); + + if (reg & (1 << 1)) + media |= SWITCH_MEDIA_AUTO; + if (reg & (1 << 2)) + media |= SWITCH_MEDIA_100; + if (reg & (1 << 3)) + media |= SWITCH_MEDIA_FD; + + len = switch_print_media(buf, media); + return len + sprintf(buf + len, "\n"); +} + +static int handle_port_media_write(char *buf, int nr) +{ + int media = switch_parse_media(buf); + int reg = adm_rreg(0, port_conf[nr]); + + if (media < 0) + return -1; + + reg &= ~((1 << 1) | (1 << 2) | (1 << 3)); + if (media & SWITCH_MEDIA_AUTO) + reg |= 1 << 1; + if (media & SWITCH_MEDIA_100) + reg |= 1 << 2; + if (media & SWITCH_MEDIA_FD) + reg |= 1 << 3; + + adm_wreg(port_conf[nr], reg); + + return 0; +} + +static int handle_vlan_enable_read(char *buf, int nr) +{ + return sprintf(buf, "%d\n", ((adm_rreg(0, 0x11) & (1 << 5)) ? 1 : 0)); +} + +static int handle_vlan_enable_write(char *buf, int nr) +{ + int reg = adm_rreg(0, 0x11); + + if (buf[0] == '1') + reg |= (1 << 5); + else if (buf[0] == '0') + reg &= ~(1 << 5); + else return -1; + + adm_wreg(0x11, (__u16) reg); + return 0; +} + +static int handle_reset(char *buf, int nr) +{ + int i; + + /* + * Reset sequence: RC high->low(100ms)->high(30ms) + * + * WAR: Certain boards don't have the correct power on + * reset logic therefore we must explicitly perform the + * sequence in software. + */ + /* Keep RC high for at least 20ms */ + adm_enout(eerc, eerc); + for (i = 0; i < 20; i ++) + udelay(1000); + /* Keep RC low for at least 100ms */ + adm_enout(eerc, 0); + for (i = 0; i < 100; i++) + udelay(1000); + /* Set default configuration */ + adm_enout((__u8)(eesk | eedi), eesk); + /* Keep RC high for at least 30ms */ + adm_enout(eerc, eerc); + for (i = 0; i < 30; i++) + udelay(1000); + /* Leave RC high and disable GPIO outputs */ + adm_disout((__u8)(eecs | eesk | eedi)); + + /* set up initial configuration for ports */ + for (i = 0; i <= 5; i++) { + int cfg = 0x8000 | /* Auto MDIX */ + (((i == 5) ? 1 : 0) << 4) | /* Tagging */ + 0xf; /* full duplex, 100Mbps, auto neg, flow ctrl */ + adm_wreg(port_conf[i], cfg); + } + + /* vlan mode select register (0x11): vlan on, mac clone */ + adm_wreg(0x11, 0xff30); + + return 0; +} + +static int handle_registers(char *buf, int nr) +{ + int i, len = 0; + + for (i = 0; i <= 0x33; i++) { + len += sprintf(buf + len, "0x%02x: 0x%04x\n", i, adm_rreg(0, i)); + } + + return len; +} + +static int handle_counters(char *buf, int nr) +{ + int i, len = 0; + + for (i = 0; i <= 0x3c; i++) { + len += sprintf(buf + len, "0x%02x: 0x%08x\n", i, adm_rreg(1, i)); + } + + return len; +} + +static int detect_adm() +{ + int ret = 0; + +#if defined(BCMGPIO2) || defined(BCMGPIO) +#ifdef LINUX_2_4 + int boardflags = getintvar(NULL, "boardflags"); +#else + extern int boardflags; +#endif + if ((boardflags & 0x80) || force) + ret = 1; + else + printk("BFL_ENETADM not set in boardflags. Use force=1 to ignore.\n"); +#else + ret = 1; +#endif + + return ret; +} + +static int __init adm_init() +{ + switch_config cfg[] = { + {"registers", handle_registers, NULL}, + {"counters", handle_counters, NULL}, + {"reset", NULL, handle_reset}, + {"enable_vlan", handle_vlan_enable_read, handle_vlan_enable_write}, + {NULL, NULL, NULL} + }; + switch_config port[] = { + {"enabled", handle_port_enable_read, handle_port_enable_write}, + {"media", handle_port_media_read, handle_port_media_write}, + {NULL, NULL, NULL} + }; + switch_config vlan[] = { + {"ports", handle_vlan_port_read, handle_vlan_port_write}, + {NULL, NULL, NULL} + }; + switch_driver driver = { + name: DRIVER_NAME, + ports: 6, + vlans: 16, + driver_handlers: cfg, + port_handlers: port, + vlan_handlers: vlan, + }; + + eecs = (1 << eecs); + eesk = (1 << eesk); + eedi = (1 << eedi); + + if (!detect_adm()) + return -ENODEV; + + return switch_register_driver(&driver); +} + +static void __exit adm_exit() +{ + switch_unregister_driver(DRIVER_NAME); +} + + +module_init(adm_init); +module_exit(adm_exit); |