diff --git a/packages/platforms/accton/x86-64/modules/builds/optoe.c b/packages/platforms/accton/x86-64/modules/builds/optoe.c deleted file mode 100755 index b3064f02..00000000 --- a/packages/platforms/accton/x86-64/modules/builds/optoe.c +++ /dev/null @@ -1,1146 +0,0 @@ -/* - * optoe.c - A driver to read and write the EEPROM on optical transceivers - * (SFP, QSFP and similar I2C based devices) - * - * Copyright (C) 2014 Cumulus networks Inc. - * Copyright (C) 2017 Finisar Corp. - * - * 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 Freeoftware Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -/* - * Description: - * a) Optical transceiver EEPROM read/write transactions are just like - * the at24 eeproms managed by the at24.c i2c driver - * b) The register/memory layout is up to 256 128 byte pages defined by - * a "pages valid" register and switched via a "page select" - * register as explained in below diagram. - * c) 256 bytes are mapped at a time. 'Lower page 00h' is the first 128 - * bytes of address space, and always references the same - * location, independent of the page select register. - * All mapped pages are mapped into the upper 128 bytes - * (offset 128-255) of the i2c address. - * d) Devices with one I2C address (eg QSFP) use I2C address 0x50 - * (A0h in the spec), and map all pages in the upper 128 bytes - * of that address. - * e) Devices with two I2C addresses (eg SFP) have 256 bytes of data - * at I2C address 0x50, and 256 bytes of data at I2C address - * 0x51 (A2h in the spec). Page selection and paged access - * only apply to this second I2C address (0x51). - * e) The address space is presented, by the driver, as a linear - * address space. For devices with one I2C client at address - * 0x50 (eg QSFP), offset 0-127 are in the lower - * half of address 50/A0h/client[0]. Offset 128-255 are in - * page 0, 256-383 are page 1, etc. More generally, offset - * 'n' resides in page (n/128)-1. ('page -1' is the lower - * half, offset 0-127). - * f) For devices with two I2C clients at address 0x50 and 0x51 (eg SFP), - * the address space places offset 0-127 in the lower - * half of 50/A0/client[0], offset 128-255 in the upper - * half. Offset 256-383 is in the lower half of 51/A2/client[1]. - * Offset 384-511 is in page 0, in the upper half of 51/A2/... - * Offset 512-639 is in page 1, in the upper half of 51/A2/... - * Offset 'n' is in page (n/128)-3 (for n > 383) - * - * One I2c addressed (eg QSFP) Memory Map - * - * 2-Wire Serial Address: 1010000x - * - * Lower Page 00h (128 bytes) - * ===================== - * | | - * | | - * | | - * | | - * | | - * | | - * | | - * | | - * | | - * | | - * |Page Select Byte(127)| - * ===================== - * | - * | - * | - * | - * V - * ------------------------------------------------------------ - * | | | | - * | | | | - * | | | | - * | | | | - * | | | | - * | | | | - * | | | | - * | | | | - * | | | | - * V V V V - * ------------ -------------- --------------- -------------- - * | | | | | | | | - * | Upper | | Upper | | Upper | | Upper | - * | Page 00h | | Page 01h | | Page 02h | | Page 03h | - * | | | (Optional) | | (Optional) | | (Optional | - * | | | | | | | for Cable | - * | | | | | | | Assemblies) | - * | ID | | AST | | User | | | - * | Fields | | Table | | EEPROM Data | | | - * | | | | | | | | - * | | | | | | | | - * | | | | | | | | - * ------------ -------------- --------------- -------------- - * - * The SFF 8436 (QSFP) spec only defines the 4 pages described above. - * In anticipation of future applications and devices, this driver - * supports access to the full architected range, 256 pages. - * - **/ - -/* #define DEBUG 1 */ - -#undef EEPROM_CLASS -#ifdef CONFIG_EEPROM_CLASS -#define EEPROM_CLASS -#endif -#ifdef CONFIG_EEPROM_CLASS_MODULE -#define EEPROM_CLASS -#endif - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef EEPROM_CLASS -#include -#endif - -#include - -/* The maximum length of a port name */ -#define MAX_PORT_NAME_LEN 20 - -struct optoe_platform_data { - u32 byte_len; /* size (sum of all addr) */ - u16 page_size; /* for writes */ - u8 flags; - void *dummy1; /* backward compatibility */ - void *dummy2; /* backward compatibility */ - -#ifdef EEPROM_CLASS - struct eeprom_platform_data *eeprom_data; -#endif - char port_name[MAX_PORT_NAME_LEN]; -}; - -/* fundamental unit of addressing for EEPROM */ -#define OPTOE_PAGE_SIZE 128 -/* - * Single address devices (eg QSFP) have 256 pages, plus the unpaged - * low 128 bytes. If the device does not support paging, it is - * only 2 'pages' long. - */ -#define OPTOE_ARCH_PAGES 256 -#define ONE_ADDR_EEPROM_SIZE ((1 + OPTOE_ARCH_PAGES) * OPTOE_PAGE_SIZE) -#define ONE_ADDR_EEPROM_UNPAGED_SIZE (2 * OPTOE_PAGE_SIZE) -/* - * Dual address devices (eg SFP) have 256 pages, plus the unpaged - * low 128 bytes, plus 256 bytes at 0x50. If the device does not - * support paging, it is 4 'pages' long. - */ -#define TWO_ADDR_EEPROM_SIZE ((3 + OPTOE_ARCH_PAGES) * OPTOE_PAGE_SIZE) -#define TWO_ADDR_EEPROM_UNPAGED_SIZE (4 * OPTOE_PAGE_SIZE) -#define TWO_ADDR_NO_0X51_SIZE (2 * OPTOE_PAGE_SIZE) - -/* a few constants to find our way around the EEPROM */ -#define OPTOE_PAGE_SELECT_REG 0x7F -#define ONE_ADDR_PAGEABLE_REG 0x02 -#define ONE_ADDR_NOT_PAGEABLE (1<<2) -#define TWO_ADDR_PAGEABLE_REG 0x40 -#define TWO_ADDR_PAGEABLE (1<<4) -#define TWO_ADDR_0X51_REG 92 -#define TWO_ADDR_0X51_SUPP (1<<6) -#define OPTOE_ID_REG 0 -#define OPTOE_READ_OP 0 -#define OPTOE_WRITE_OP 1 -#define OPTOE_EOF 0 /* used for access beyond end of device */ - -struct optoe_data { - struct optoe_platform_data chip; - int use_smbus; - char port_name[MAX_PORT_NAME_LEN]; - - /* - * Lock protects against activities from other Linux tasks, - * but not from changes by other I2C masters. - */ - struct mutex lock; - struct bin_attribute bin; - struct attribute_group attr_group; - - u8 *writebuf; - unsigned int write_max; - - unsigned int num_addresses; - -#ifdef EEPROM_CLASS - struct eeprom_device *eeprom_dev; -#endif - - /* dev_class: ONE_ADDR (QSFP) or TWO_ADDR (SFP) */ - int dev_class; - - struct i2c_client *client[]; -}; - - -/* - * This parameter is to help this driver avoid blocking other drivers out - * of I2C for potentially troublesome amounts of time. With a 100 kHz I2C - * clock, one 256 byte read takes about 1/43 second which is excessive; - * but the 1/170 second it takes at 400 kHz may be quite reasonable; and - * at 1 MHz (Fm+) a 1/430 second delay could easily be invisible. - * - * This value is forced to be a power of two so that writes align on pages. - */ -static unsigned int io_limit = OPTOE_PAGE_SIZE; - -/* - * specs often allow 5 msec for a page write, sometimes 20 msec; - * it's important to recover from write timeouts. - */ -static unsigned int write_timeout = 25; - -/* - * flags to distinguish one-address (QSFP family) from two-address (SFP family) - * If the family is not known, figure it out when the device is accessed - */ -#define ONE_ADDR 1 -#define TWO_ADDR 2 - -static const struct i2c_device_id optoe_ids[] = { - { "optoe1", ONE_ADDR }, - { "optoe2", TWO_ADDR }, - { "sff8436", ONE_ADDR }, - { "24c04", TWO_ADDR }, - { /* END OF LIST */ } -}; -MODULE_DEVICE_TABLE(i2c, optoe_ids); - -/*-------------------------------------------------------------------------*/ -/* - * This routine computes the addressing information to be used for - * a given r/w request. - * - * Task is to calculate the client (0 = i2c addr 50, 1 = i2c addr 51), - * the page, and the offset. - * - * Handles both single address (eg QSFP) and two address (eg SFP). - * For SFP, offset 0-255 are on client[0], >255 is on client[1] - * Offset 256-383 are on the lower half of client[1] - * Pages are accessible on the upper half of client[1]. - * Offset >383 are in 128 byte pages mapped into the upper half - * - * For QSFP, all offsets are on client[0] - * offset 0-127 are on the lower half of client[0] (no paging) - * Pages are accessible on the upper half of client[1]. - * Offset >127 are in 128 byte pages mapped into the upper half - * - * Callers must not read/write beyond the end of a client or a page - * without recomputing the client/page. Hence offset (within page) - * plus length must be less than or equal to 128. (Note that this - * routine does not have access to the length of the call, hence - * cannot do the validity check.) - * - * Offset within Lower Page 00h and Upper Page 00h are not recomputed - */ - -static uint8_t optoe_translate_offset(struct optoe_data *optoe, - loff_t *offset, struct i2c_client **client) -{ - unsigned int page = 0; - - *client = optoe->client[0]; - - /* if SFP style, offset > 255, shift to i2c addr 0x51 */ - if (optoe->dev_class == TWO_ADDR) { - if (*offset > 255) { - /* like QSFP, but shifted to client[1] */ - *client = optoe->client[1]; - *offset -= 256; - } - } - - /* - * if offset is in the range 0-128... - * page doesn't matter (using lower half), return 0. - * offset is already correct (don't add 128 to get to paged area) - */ - if (*offset < OPTOE_PAGE_SIZE) - return page; - - /* note, page will always be positive since *offset >= 128 */ - page = (*offset >> 7)-1; - /* 0x80 places the offset in the top half, offset is last 7 bits */ - *offset = OPTOE_PAGE_SIZE + (*offset & 0x7f); - - return page; /* note also returning client and offset */ -} - -static ssize_t optoe_eeprom_read(struct optoe_data *optoe, - struct i2c_client *client, - char *buf, unsigned int offset, size_t count) -{ - struct i2c_msg msg[2]; - u8 msgbuf[2]; - unsigned long timeout, read_time; - int status, i; - - memset(msg, 0, sizeof(msg)); - - switch (optoe->use_smbus) { - case I2C_SMBUS_I2C_BLOCK_DATA: - /*smaller eeproms can work given some SMBus extension calls */ - if (count > I2C_SMBUS_BLOCK_MAX) - count = I2C_SMBUS_BLOCK_MAX; - break; - case I2C_SMBUS_WORD_DATA: - /* Check for odd length transaction */ - count = (count == 1) ? 1 : 2; - break; - case I2C_SMBUS_BYTE_DATA: - count = 1; - break; - default: - /* - * When we have a better choice than SMBus calls, use a - * combined I2C message. Write address; then read up to - * io_limit data bytes. msgbuf is u8 and will cast to our - * needs. - */ - i = 0; - msgbuf[i++] = offset; - - msg[0].addr = client->addr; - msg[0].buf = msgbuf; - msg[0].len = i; - - msg[1].addr = client->addr; - msg[1].flags = I2C_M_RD; - msg[1].buf = buf; - msg[1].len = count; - } - - /* - * Reads fail if the previous write didn't complete yet. We may - * loop a few times until this one succeeds, waiting at least - * long enough for one entire page write to work. - */ - timeout = jiffies + msecs_to_jiffies(write_timeout); - do { - read_time = jiffies; - - switch (optoe->use_smbus) { - case I2C_SMBUS_I2C_BLOCK_DATA: - status = i2c_smbus_read_i2c_block_data(client, offset, - count, buf); - break; - case I2C_SMBUS_WORD_DATA: - status = i2c_smbus_read_word_data(client, offset); - if (status >= 0) { - buf[0] = status & 0xff; - if (count == 2) - buf[1] = status >> 8; - status = count; - } - break; - case I2C_SMBUS_BYTE_DATA: - status = i2c_smbus_read_byte_data(client, offset); - if (status >= 0) { - buf[0] = status; - status = count; - } - break; - default: - status = i2c_transfer(client->adapter, msg, 2); - if (status == 2) - status = count; - } - - dev_dbg(&client->dev, "eeprom read %zu@%d --> %d (%ld)\n", - count, offset, status, jiffies); - - if (status == count) /* happy path */ - return count; - - if (status == -ENXIO) /* no module present */ - return status; - - /* REVISIT: at HZ=100, this is sloooow */ - usleep_range(1000, 2000); - } while (time_before(read_time, timeout)); - - return -ETIMEDOUT; -} - -static ssize_t optoe_eeprom_write(struct optoe_data *optoe, - struct i2c_client *client, - const char *buf, - unsigned int offset, size_t count) -{ - struct i2c_msg msg; - ssize_t status; - unsigned long timeout, write_time; - unsigned int next_page_start; - int i = 0; - - /* write max is at most a page - * (In this driver, write_max is actually one byte!) - */ - if (count > optoe->write_max) - count = optoe->write_max; - - /* shorten count if necessary to avoid crossing page boundary */ - next_page_start = roundup(offset + 1, OPTOE_PAGE_SIZE); - if (offset + count > next_page_start) - count = next_page_start - offset; - - switch (optoe->use_smbus) { - case I2C_SMBUS_I2C_BLOCK_DATA: - /*smaller eeproms can work given some SMBus extension calls */ - if (count > I2C_SMBUS_BLOCK_MAX) - count = I2C_SMBUS_BLOCK_MAX; - break; - case I2C_SMBUS_WORD_DATA: - /* Check for odd length transaction */ - count = (count == 1) ? 1 : 2; - break; - case I2C_SMBUS_BYTE_DATA: - count = 1; - break; - default: - /* If we'll use I2C calls for I/O, set up the message */ - msg.addr = client->addr; - msg.flags = 0; - - /* msg.buf is u8 and casts will mask the values */ - msg.buf = optoe->writebuf; - - msg.buf[i++] = offset; - memcpy(&msg.buf[i], buf, count); - msg.len = i + count; - break; - } - - /* - * Reads fail if the previous write didn't complete yet. We may - * loop a few times until this one succeeds, waiting at least - * long enough for one entire page write to work. - */ - timeout = jiffies + msecs_to_jiffies(write_timeout); - do { - write_time = jiffies; - - switch (optoe->use_smbus) { - case I2C_SMBUS_I2C_BLOCK_DATA: - status = i2c_smbus_write_i2c_block_data(client, - offset, count, buf); - if (status == 0) - status = count; - break; - case I2C_SMBUS_WORD_DATA: - if (count == 2) { - status = i2c_smbus_write_word_data(client, - offset, (u16)((buf[0])|(buf[1] << 8))); - } else { - /* count = 1 */ - status = i2c_smbus_write_byte_data(client, - offset, buf[0]); - } - if (status == 0) - status = count; - break; - case I2C_SMBUS_BYTE_DATA: - status = i2c_smbus_write_byte_data(client, offset, - buf[0]); - if (status == 0) - status = count; - break; - default: - status = i2c_transfer(client->adapter, &msg, 1); - if (status == 1) - status = count; - break; - } - - dev_dbg(&client->dev, "eeprom write %zu@%d --> %ld (%lu)\n", - count, offset, (long int) status, jiffies); - - if (status == count) - return count; - - /* REVISIT: at HZ=100, this is sloooow */ - usleep_range(1000, 2000); - } while (time_before(write_time, timeout)); - - return -ETIMEDOUT; -} - - -static ssize_t optoe_eeprom_update_client(struct optoe_data *optoe, - char *buf, loff_t off, - size_t count, int opcode) -{ - struct i2c_client *client; - ssize_t retval = 0; - uint8_t page = 0; - loff_t phy_offset = off; - int ret = 0; - - page = optoe_translate_offset(optoe, &phy_offset, &client); - dev_dbg(&client->dev, - "%s off %lld page:%d phy_offset:%lld, count:%ld, opcode:%d\n", - __func__, off, page, phy_offset, (long int) count, opcode); - if (page > 0) { - ret = optoe_eeprom_write(optoe, client, &page, - OPTOE_PAGE_SELECT_REG, 1); - if (ret < 0) { - dev_dbg(&client->dev, - "Write page register for page %d failed ret:%d!\n", - page, ret); - return ret; - } - } - - while (count) { - ssize_t status; - - if (opcode == OPTOE_READ_OP) { - status = optoe_eeprom_read(optoe, client, - buf, phy_offset, count); - } else { - status = optoe_eeprom_write(optoe, client, - buf, phy_offset, count); - } - if (status <= 0) { - if (retval == 0) - retval = status; - break; - } - buf += status; - phy_offset += status; - count -= status; - retval += status; - } - - - if (page > 0) { - /* return the page register to page 0 (why?) */ - page = 0; - ret = optoe_eeprom_write(optoe, client, &page, - OPTOE_PAGE_SELECT_REG, 1); - if (ret < 0) { - dev_err(&client->dev, - "Restore page register to 0 failed:%d!\n", ret); - /* error only if nothing has been transferred */ - if (retval == 0) - retval = ret; - } - } - return retval; -} - -/* - * Figure out if this access is within the range of supported pages. - * Note this is called on every access because we don't know if the - * module has been replaced since the last call. - * If/when modules support more pages, this is the routine to update - * to validate and allow access to additional pages. - * - * Returns updated len for this access: - * - entire access is legal, original len is returned. - * - access begins legal but is too long, len is truncated to fit. - * - initial offset exceeds supported pages, return OPTOE_EOF (zero) - */ -static ssize_t optoe_page_legal(struct optoe_data *optoe, - loff_t off, size_t len) -{ - struct i2c_client *client = optoe->client[0]; - u8 regval; - int status; - size_t maxlen; - - if (off < 0) - return -EINVAL; - if (optoe->dev_class == TWO_ADDR) { - /* SFP case */ - /* if only using addr 0x50 (first 256 bytes) we're good */ - if ((off + len) <= TWO_ADDR_NO_0X51_SIZE) - return len; - /* if offset exceeds possible pages, we're not good */ - if (off >= TWO_ADDR_EEPROM_SIZE) - return OPTOE_EOF; - /* in between, are pages supported? */ - status = optoe_eeprom_read(optoe, client, ®val, - TWO_ADDR_PAGEABLE_REG, 1); - if (status < 0) - return status; /* error out (no module?) */ - if (regval & TWO_ADDR_PAGEABLE) { - /* Pages supported, trim len to the end of pages */ - maxlen = TWO_ADDR_EEPROM_SIZE - off; - } else { - /* pages not supported, trim len to unpaged size */ - if (off >= TWO_ADDR_EEPROM_UNPAGED_SIZE) - return OPTOE_EOF; - - /* will be accessing addr 0x51, is that supported? */ - /* byte 92, bit 6 implies DDM support, 0x51 support */ - status = optoe_eeprom_read(optoe, client, ®val, - TWO_ADDR_0X51_REG, 1); - if (status < 0) - return status; - if (regval & TWO_ADDR_0X51_SUPP) { - /* addr 0x51 is OK */ - maxlen = TWO_ADDR_EEPROM_UNPAGED_SIZE - off; - } else { - /* addr 0x51 NOT supported, trim to 256 max */ - if (off >= TWO_ADDR_NO_0X51_SIZE) - return OPTOE_EOF; - maxlen = TWO_ADDR_NO_0X51_SIZE - off; - } - } - len = (len > maxlen) ? maxlen : len; - dev_dbg(&client->dev, - "page_legal, SFP, off %lld len %ld\n", - off, (long int) len); - } else { - /* QSFP case */ - /* if no pages needed, we're good */ - if ((off + len) <= ONE_ADDR_EEPROM_UNPAGED_SIZE) - return len; - /* if offset exceeds possible pages, we're not good */ - if (off >= ONE_ADDR_EEPROM_SIZE) - return OPTOE_EOF; - /* in between, are pages supported? */ - status = optoe_eeprom_read(optoe, client, ®val, - ONE_ADDR_PAGEABLE_REG, 1); - if (status < 0) - return status; /* error out (no module?) */ - if (regval & ONE_ADDR_NOT_PAGEABLE) { - /* pages not supported, trim len to unpaged size */ - if (off >= ONE_ADDR_EEPROM_UNPAGED_SIZE) - return OPTOE_EOF; - maxlen = ONE_ADDR_EEPROM_UNPAGED_SIZE - off; - } else { - /* Pages supported, trim len to the end of pages */ - maxlen = ONE_ADDR_EEPROM_SIZE - off; - } - len = (len > maxlen) ? maxlen : len; - dev_dbg(&client->dev, - "page_legal, QSFP, off %lld len %ld\n", - off, (long int) len); - } - return len; -} - -static ssize_t optoe_read_write(struct optoe_data *optoe, - char *buf, loff_t off, size_t len, int opcode) -{ - struct i2c_client *client = optoe->client[0]; - int chunk; - int status = 0; - ssize_t retval; - size_t pending_len = 0, chunk_len = 0; - loff_t chunk_offset = 0, chunk_start_offset = 0; - - dev_dbg(&client->dev, - "%s: off %lld len:%ld, opcode:%s\n", - __func__, off, (long int) len, - (opcode == OPTOE_READ_OP) ? "r" : "w"); - if (unlikely(!len)) - return len; - - /* - * Read data from chip, protecting against concurrent updates - * from this host, but not from other I2C masters. - */ - mutex_lock(&optoe->lock); - - /* - * Confirm this access fits within the device suppored addr range - */ - status = optoe_page_legal(optoe, off, len); - if ((status == OPTOE_EOF) || (status < 0)) { - mutex_unlock(&optoe->lock); - return status; - } - len = status; - - /* - * For each (128 byte) chunk involved in this request, issue a - * separate call to sff_eeprom_update_client(), to - * ensure that each access recalculates the client/page - * and writes the page register as needed. - * Note that chunk to page mapping is confusing, is different for - * QSFP and SFP, and never needs to be done. Don't try! - */ - pending_len = len; /* amount remaining to transfer */ - retval = 0; /* amount transferred */ - for (chunk = off >> 7; chunk <= (off + len - 1) >> 7; chunk++) { - - /* - * Compute the offset and number of bytes to be read/write - * - * 1. start at offset 0 (within the chunk), and read/write - * the entire chunk - * 2. start at offset 0 (within the chunk) and read/write less - * than entire chunk - * 3. start at an offset not equal to 0 and read/write the rest - * of the chunk - * 4. start at an offset not equal to 0 and read/write less than - * (end of chunk - offset) - */ - chunk_start_offset = chunk * OPTOE_PAGE_SIZE; - - if (chunk_start_offset < off) { - chunk_offset = off; - if ((off + pending_len) < (chunk_start_offset + - OPTOE_PAGE_SIZE)) - chunk_len = pending_len; - else - chunk_len = OPTOE_PAGE_SIZE - off; - } else { - chunk_offset = chunk_start_offset; - if (pending_len > OPTOE_PAGE_SIZE) - chunk_len = OPTOE_PAGE_SIZE; - else - chunk_len = pending_len; - } - - dev_dbg(&client->dev, - "sff_r/w: off %lld, len %ld, chunk_start_offset %lld, chunk_offset %lld, chunk_len %ld, pending_len %ld\n", - off, (long int) len, chunk_start_offset, chunk_offset, - (long int) chunk_len, (long int) pending_len); - - /* - * note: chunk_offset is from the start of the EEPROM, - * not the start of the chunk - */ - status = optoe_eeprom_update_client(optoe, buf, - chunk_offset, chunk_len, opcode); - if (status != chunk_len) { - /* This is another 'no device present' path */ - dev_dbg(&client->dev, - "o_u_c: chunk %d c_offset %lld c_len %ld failed %d!\n", - chunk, chunk_offset, (long int) chunk_len, status); - if (status > 0) - retval += status; - if (retval == 0) - retval = status; - break; - } - buf += status; - pending_len -= status; - retval += status; - } - mutex_unlock(&optoe->lock); - - return retval; -} - -static ssize_t optoe_bin_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, size_t count) -{ - struct i2c_client *client = to_i2c_client(container_of(kobj, - struct device, kobj)); - struct optoe_data *optoe = i2c_get_clientdata(client); - - return optoe_read_write(optoe, buf, off, count, OPTOE_READ_OP); -} - - -static ssize_t optoe_bin_write(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, size_t count) -{ - struct i2c_client *client = to_i2c_client(container_of(kobj, - struct device, kobj)); - struct optoe_data *optoe = i2c_get_clientdata(client); - - return optoe_read_write(optoe, buf, off, count, OPTOE_WRITE_OP); -} - -static int optoe_remove(struct i2c_client *client) -{ - struct optoe_data *optoe; - int i; - - optoe = i2c_get_clientdata(client); - sysfs_remove_group(&client->dev.kobj, &optoe->attr_group); - sysfs_remove_bin_file(&client->dev.kobj, &optoe->bin); - - for (i = 1; i < optoe->num_addresses; i++) - i2c_unregister_device(optoe->client[i]); - -#ifdef EEPROM_CLASS - eeprom_device_unregister(optoe->eeprom_dev); -#endif - - kfree(optoe->writebuf); - kfree(optoe); - return 0; -} - -static ssize_t show_dev_class(struct device *dev, - struct device_attribute *dattr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - struct optoe_data *optoe = i2c_get_clientdata(client); - ssize_t count; - - mutex_lock(&optoe->lock); - count = sprintf(buf, "%d\n", optoe->dev_class); - mutex_unlock(&optoe->lock); - - return count; -} - -static ssize_t set_dev_class(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct optoe_data *optoe = i2c_get_clientdata(client); - int dev_class; - - /* - * dev_class is actually the number of i2c addresses used, thus - * legal values are "1" (QSFP class) and "2" (SFP class) - */ - - if (kstrtoint(buf, 0, &dev_class) != 0 || - dev_class < 1 || dev_class > 2) - return -EINVAL; - - mutex_lock(&optoe->lock); - optoe->dev_class = dev_class; - mutex_unlock(&optoe->lock); - - return count; -} - -/* - * if using the EEPROM CLASS driver, we don't report a port_name, - * the EEPROM CLASS drive handles that. Hence all this code is - * only compiled if we are NOT using the EEPROM CLASS driver. - */ -#ifndef EEPROM_CLASS - -static ssize_t show_port_name(struct device *dev, - struct device_attribute *dattr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - struct optoe_data *optoe = i2c_get_clientdata(client); - ssize_t count; - - mutex_lock(&optoe->lock); - count = sprintf(buf, "%s\n", optoe->port_name); - mutex_unlock(&optoe->lock); - - return count; -} - -static ssize_t set_port_name(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct optoe_data *optoe = i2c_get_clientdata(client); - char port_name[MAX_PORT_NAME_LEN]; - - /* no checking, this value is not used except by show_port_name */ - - if (sscanf(buf, "%19s", port_name) != 1) - return -EINVAL; - - mutex_lock(&optoe->lock); - strcpy(optoe->port_name, port_name); - mutex_unlock(&optoe->lock); - - return count; -} - -static DEVICE_ATTR(port_name, 0644, show_port_name, set_port_name); -#endif /* if NOT defined EEPROM_CLASS, the common case */ - -static DEVICE_ATTR(dev_class, 0644, show_dev_class, set_dev_class); - -static struct attribute *optoe_attrs[] = { -#ifndef EEPROM_CLASS - &dev_attr_port_name.attr, -#endif - &dev_attr_dev_class.attr, - NULL, -}; - -static struct attribute_group optoe_attr_group = { - .attrs = optoe_attrs, -}; - -static int optoe_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int err; - int use_smbus = 0; - struct optoe_platform_data chip; - struct optoe_data *optoe; - int num_addresses = 0; - char port_name[MAX_PORT_NAME_LEN]; - - if (client->addr != 0x50) { - dev_dbg(&client->dev, "probe, bad i2c addr: 0x%x\n", - client->addr); - err = -EINVAL; - goto exit; - } - - if (client->dev.platform_data) { - chip = *(struct optoe_platform_data *)client->dev.platform_data; - /* take the port name from the supplied platform data */ -#ifdef EEPROM_CLASS - strncpy(port_name, chip.eeprom_data->label, MAX_PORT_NAME_LEN); -#else - memcpy(port_name, chip.port_name, MAX_PORT_NAME_LEN); -#endif - dev_dbg(&client->dev, - "probe, chip provided, flags:0x%x; name: %s\n", - chip.flags, client->name); - } else { - if (!id->driver_data) { - err = -ENODEV; - goto exit; - } - dev_dbg(&client->dev, "probe, building chip\n"); - strcpy(port_name, "unitialized"); - chip.flags = 0; -#ifdef EEPROM_CLASS - chip.eeprom_data = NULL; -#endif - } - - /* Use I2C operations unless we're stuck with SMBus extensions. */ - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - if (i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_I2C_BLOCK)) { - use_smbus = I2C_SMBUS_I2C_BLOCK_DATA; - } else if (i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_WORD_DATA)) { - use_smbus = I2C_SMBUS_WORD_DATA; - } else if (i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_READ_BYTE_DATA)) { - use_smbus = I2C_SMBUS_BYTE_DATA; - } else { - err = -EPFNOSUPPORT; - goto exit; - } - } - - - /* - * Make room for two i2c clients - */ - num_addresses = 2; - - optoe = kzalloc(sizeof(struct optoe_data) + - num_addresses * sizeof(struct i2c_client *), - GFP_KERNEL); - if (!optoe) { - err = -ENOMEM; - goto exit; - } - - mutex_init(&optoe->lock); - - /* determine whether this is a one-address or two-address module */ - if ((strcmp(client->name, "optoe1") == 0) || - (strcmp(client->name, "sff8436") == 0)) { - /* one-address (eg QSFP) family */ - optoe->dev_class = ONE_ADDR; - chip.byte_len = ONE_ADDR_EEPROM_SIZE; - num_addresses = 1; - } else if ((strcmp(client->name, "optoe2") == 0) || - (strcmp(client->name, "24c04") == 0)) { - /* SFP family */ - optoe->dev_class = TWO_ADDR; - chip.byte_len = TWO_ADDR_EEPROM_SIZE; - } else { /* those were the only two choices */ - err = -EINVAL; - goto exit; - } - - dev_dbg(&client->dev, "dev_class: %d\n", optoe->dev_class); - optoe->use_smbus = use_smbus; - optoe->chip = chip; - optoe->num_addresses = num_addresses; - memcpy(optoe->port_name, port_name, MAX_PORT_NAME_LEN); - - /* - * Export the EEPROM bytes through sysfs, since that's convenient. - * By default, only root should see the data (maybe passwords etc) - */ - sysfs_bin_attr_init(&optoe->bin); - optoe->bin.attr.name = "eeprom"; - optoe->bin.attr.mode = 0444; - optoe->bin.read = optoe_bin_read; - optoe->bin.size = chip.byte_len; - - if (!use_smbus || - (i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) || - i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WRITE_WORD_DATA) || - i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) { - /* - * NOTE: AN-2079 - * Finisar recommends that the host implement 1 byte writes - * only since this module only supports 32 byte page boundaries. - * 2 byte writes are acceptable for PE and Vout changes per - * Application Note AN-2071. - */ - unsigned int write_max = 1; - - optoe->bin.write = optoe_bin_write; - optoe->bin.attr.mode |= 0200; - - if (write_max > io_limit) - write_max = io_limit; - if (use_smbus && write_max > I2C_SMBUS_BLOCK_MAX) - write_max = I2C_SMBUS_BLOCK_MAX; - optoe->write_max = write_max; - - /* buffer (data + address at the beginning) */ - optoe->writebuf = kmalloc(write_max + 2, GFP_KERNEL); - if (!optoe->writebuf) { - err = -ENOMEM; - goto exit_kfree; - } - } else { - dev_warn(&client->dev, - "cannot write due to controller restrictions."); - } - - optoe->client[0] = client; - - /* SFF-8472 spec requires that the second I2C address be 0x51 */ - if (num_addresses == 2) { - optoe->client[1] = i2c_new_dummy(client->adapter, 0x51); - if (!optoe->client[1]) { - dev_err(&client->dev, "address 0x51 unavailable\n"); - err = -EADDRINUSE; - goto err_struct; - } - } - - /* create the sysfs eeprom file */ - err = sysfs_create_bin_file(&client->dev.kobj, &optoe->bin); - if (err) - goto err_struct; - - optoe->attr_group = optoe_attr_group; - - err = sysfs_create_group(&client->dev.kobj, &optoe->attr_group); - if (err) { - dev_err(&client->dev, "failed to create sysfs attribute group.\n"); - goto err_struct; - } - -#ifdef EEPROM_CLASS - optoe->eeprom_dev = eeprom_device_register(&client->dev, - chip.eeprom_data); - if (IS_ERR(optoe->eeprom_dev)) { - dev_err(&client->dev, "error registering eeprom device.\n"); - err = PTR_ERR(optoe->eeprom_dev); - goto err_sysfs_cleanup; - } -#endif - - i2c_set_clientdata(client, optoe); - - dev_info(&client->dev, "%zu byte %s EEPROM, %s\n", - optoe->bin.size, client->name, - optoe->bin.write ? "read/write" : "read-only"); - - if (use_smbus == I2C_SMBUS_WORD_DATA || - use_smbus == I2C_SMBUS_BYTE_DATA) { - dev_notice(&client->dev, - "Falling back to %s reads, performance will suffer\n", - use_smbus == I2C_SMBUS_WORD_DATA ? "word" : "byte"); - } - - return 0; - -#ifdef EEPROM_CLASS -err_sysfs_cleanup: - sysfs_remove_group(&client->dev.kobj, &optoe->attr_group); - sysfs_remove_bin_file(&client->dev.kobj, &optoe->bin); -#endif - -err_struct: - if (num_addresses == 2) { - if (optoe->client[1]) - i2c_unregister_device(optoe->client[1]); - } - - kfree(optoe->writebuf); -exit_kfree: - kfree(optoe); -exit: - dev_dbg(&client->dev, "probe error %d\n", err); - - return err; -} - -/*-------------------------------------------------------------------------*/ - -static struct i2c_driver optoe_driver = { - .driver = { - .name = "optoe", - .owner = THIS_MODULE, - }, - .probe = optoe_probe, - .remove = optoe_remove, - .id_table = optoe_ids, -}; - -static int __init optoe_init(void) -{ - - if (!io_limit) { - pr_err("optoe: io_limit must not be 0!\n"); - return -EINVAL; - } - - io_limit = rounddown_pow_of_two(io_limit); - return i2c_add_driver(&optoe_driver); -} -module_init(optoe_init); - -static void __exit optoe_exit(void) -{ - i2c_del_driver(&optoe_driver); -} -module_exit(optoe_exit); - -MODULE_DESCRIPTION("Driver for optical transceiver (SFP, QSFP, ...) EEPROMs"); -MODULE_AUTHOR("DON BOLLINGER "); -MODULE_LICENSE("GPL");