bcma: read SPROM and extract MAC from it (27f18dc2) · Commits · 戴 / test

drivers/bcma/Makefile

+1 −1

Original line number	Diff line number	Diff line
		bcma-y += main.o scan.o core.o
		bcma-y += main.o scan.o core.o sprom.o
		bcma-y += driver_chipcommon.o driver_chipcommon_pmu.o
		bcma-y += driver_pci.o
		bcma-$(CONFIG_BCMA_HOST_PCI) += host_pci.o

drivers/bcma/bcma_private.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,9 @@ extern void bcma_bus_unregister(struct bcma_bus *bus);
		/* scan.c */
		int bcma_bus_scan(struct bcma_bus *bus);

		/* sprom.c */
		int bcma_sprom_get(struct bcma_bus *bus);

		#ifdef CONFIG_BCMA_HOST_PCI
		/* host_pci.c */
		extern int __init bcma_host_pci_init(void);

drivers/bcma/main.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -146,6 +146,13 @@ int bcma_bus_register(struct bcma_bus *bus)
		bcma_core_pci_init(&bus->drv_pci);
		}

		/* Try to get SPROM */
		err = bcma_sprom_get(bus);
		if (err) {
		pr_err("Failed to get SPROM: %d\n", err);
		return -ENOENT;
		}

		/* Register found cores */
		bcma_register_cores(bus);

drivers/bcma/sprom.c

0 → 100644

+162 −0

Original line number	Diff line number	Diff line
		/*
		* Broadcom specific AMBA
		* SPROM reading
		*
		* Licensed under the GNU/GPL. See COPYING for details.
		*/

		#include "bcma_private.h"

		#include <linux/bcma/bcma.h>
		#include <linux/bcma/bcma_regs.h>
		#include <linux/pci.h>
		#include <linux/io.h>
		#include <linux/dma-mapping.h>
		#include <linux/slab.h>

		#define SPOFF(offset) ((offset) / sizeof(u16))

		/**************************************************
		* R/W ops.
		**************************************************/

		static void bcma_sprom_read(struct bcma_bus bus, u16 sprom)
		{
		int i;
		for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++)
		sprom[i] = bcma_read16(bus->drv_cc.core,
		BCMA_CC_SPROM + (i * 2));
		}

		/**************************************************
		* Validation.
		**************************************************/

		static inline u8 bcma_crc8(u8 crc, u8 data)
		{
		/* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
		static const u8 t[] = {
		0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
		0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
		0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
		0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
		0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
		0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
		0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
		0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
		0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
		0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
		0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
		0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
		0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
		0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
		0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
		0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
		0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
		0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
		0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
		0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
		0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
		0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
		0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
		0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
		0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
		0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
		0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
		0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
		0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
		0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
		0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
		0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
		};
		return t[crc ^ data];
		}

		static u8 bcma_sprom_crc(const u16 *sprom)
		{
		int word;
		u8 crc = 0xFF;

		for (word = 0; word < SSB_SPROMSIZE_WORDS_R4 - 1; word++) {
		crc = bcma_crc8(crc, sprom[word] & 0x00FF);
		crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8);
		}
		crc = bcma_crc8(crc, sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & 0x00FF);
		crc ^= 0xFF;

		return crc;
		}

		static int bcma_sprom_check_crc(const u16 *sprom)
		{
		u8 crc;
		u8 expected_crc;
		u16 tmp;

		crc = bcma_sprom_crc(sprom);
		tmp = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_CRC;
		expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
		if (crc != expected_crc)
		return -EPROTO;

		return 0;
		}

		static int bcma_sprom_valid(const u16 *sprom)
		{
		u16 revision;
		int err;

		err = bcma_sprom_check_crc(sprom);
		if (err)
		return err;

		revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV;
		if (revision != 8) {
		pr_err("Unsupported SPROM revision: %d\n", revision);
		return -ENOENT;
		}

		return 0;
		}

		/**************************************************
		* SPROM extraction.
		**************************************************/

		static void bcma_sprom_extract_r8(struct bcma_bus bus, const u16 sprom)
		{
		u16 v;
		int i;

		for (i = 0; i < 3; i++) {
		v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i];
		(((__be16 )bus->sprom.il0mac) + i) = cpu_to_be16(v);
		}
		}

		int bcma_sprom_get(struct bcma_bus *bus)
		{
		u16 *sprom;
		int err = 0;

		if (!bus->drv_cc.core)
		return -EOPNOTSUPP;

		sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
		GFP_KERNEL);
		if (!sprom)
		return -ENOMEM;

		bcma_sprom_read(bus, sprom);

		err = bcma_sprom_valid(sprom);
		if (err)
		goto out;

		bcma_sprom_extract_r8(bus, sprom);

		out:
		kfree(sprom);
		return err;
		}

include/linux/bcma/bcma.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@

		#include <linux/bcma/bcma_driver_chipcommon.h>
		#include <linux/bcma/bcma_driver_pci.h>
		#include <linux/ssb/ssb.h> /* SPROM sharing */

		#include "bcma_regs.h"

		@@ -187,6 +188,10 @@ struct bcma_bus {

		struct bcma_drv_cc drv_cc;
		struct bcma_drv_pci drv_pci;

		/* We decided to share SPROM struct with SSB as long as we do not need
		* any hacks for BCMA. This simplifies drivers code. */
		struct ssb_sprom sprom;
		};

		extern inline u32 bcma_read8(struct bcma_device *core, u16 offset)

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