From cf9610f9116d55c5a66ef9f1faecacabd93a9322 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 24 Aug 2026 08:46:03 -0700 Subject: Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ... --- drivers/media/common/ttpci-eeprom.c | 159 ++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 drivers/media/common/ttpci-eeprom.c (limited to 'drivers/media/common/ttpci-eeprom.c') diff --git a/drivers/media/common/ttpci-eeprom.c b/drivers/media/common/ttpci-eeprom.c new file mode 100644 index 000000000..ef8746684 --- /dev/null +++ b/drivers/media/common/ttpci-eeprom.c @@ -0,0 +1,159 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + Retrieve encoded MAC address from 24C16 serial 2-wire EEPROM, + decode it and store it in the associated adapter struct for + use by dvb_net.c + + This card appear to have the 24C16 write protect held to ground, + thus permitting normal read/write operation. Theoretically it + would be possible to write routines to burn a different (encoded) + MAC address into the EEPROM. + + Robert Schlabbach GMX + Michael Glaum KVH Industries + Holger Waechtler Convergence + + Copyright (C) 2002-2003 Ralph Metzler + Metzler Brothers Systementwicklung GbR + + +*/ + +#include +#include +#include +#include +#include +#include + +#include "ttpci-eeprom.h" + +#if 1 +#define dprintk(x...) do { printk(x); } while (0) +#else +#define dprintk(x...) do { } while (0) +#endif + + +static int check_mac_tt(u8 *buf) +{ + int i; + u16 tmp = 0xffff; + + for (i = 0; i < 8; i++) { + tmp = (tmp << 8) | ((tmp >> 8) ^ buf[i]); + tmp ^= (tmp >> 4) & 0x0f; + tmp ^= (tmp << 12) ^ ((tmp & 0xff) << 5); + } + tmp ^= 0xffff; + return (((tmp >> 8) ^ buf[8]) | ((tmp & 0xff) ^ buf[9])); +} + +static int getmac_tt(u8 * decodedMAC, u8 * encodedMAC) +{ + u8 xor[20] = { 0x72, 0x23, 0x68, 0x19, 0x5c, 0xa8, 0x71, 0x2c, + 0x54, 0xd3, 0x7b, 0xf1, 0x9E, 0x23, 0x16, 0xf6, + 0x1d, 0x36, 0x64, 0x78}; + u8 data[20]; + int i; + + /* In case there is a sig check failure have the orig contents available */ + memcpy(data, encodedMAC, 20); + + for (i = 0; i < 20; i++) + data[i] ^= xor[i]; + for (i = 0; i < 10; i++) + data[i] = ((data[2 * i + 1] << 8) | data[2 * i]) + >> ((data[2 * i + 1] >> 6) & 3); + + if (check_mac_tt(data)) + return -ENODEV; + + decodedMAC[0] = data[2]; decodedMAC[1] = data[1]; decodedMAC[2] = data[0]; + decodedMAC[3] = data[6]; decodedMAC[4] = data[5]; decodedMAC[5] = data[4]; + return 0; +} + +int ttpci_eeprom_decode_mac(u8 *decodedMAC, u8 *encodedMAC) +{ + u8 xor[20] = { 0x72, 0x23, 0x68, 0x19, 0x5c, 0xa8, 0x71, 0x2c, + 0x54, 0xd3, 0x7b, 0xf1, 0x9E, 0x23, 0x16, 0xf6, + 0x1d, 0x36, 0x64, 0x78}; + u8 data[20]; + int i; + + memcpy(data, encodedMAC, 20); + + for (i = 0; i < 20; i++) + data[i] ^= xor[i]; + for (i = 0; i < 10; i++) + data[i] = ((data[2 * i + 1] << 8) | data[2 * i]) + >> ((data[2 * i + 1] >> 6) & 3); + + if (check_mac_tt(data)) + return -ENODEV; + + decodedMAC[0] = data[2]; + decodedMAC[1] = data[1]; + decodedMAC[2] = data[0]; + decodedMAC[3] = data[6]; + decodedMAC[4] = data[5]; + decodedMAC[5] = data[4]; + return 0; +} +EXPORT_SYMBOL(ttpci_eeprom_decode_mac); + +static int ttpci_eeprom_read_encodedMAC(struct i2c_adapter *adapter, u8 * encodedMAC) +{ + int ret; + u8 b0[] = { 0xcc }; + + struct i2c_msg msg[] = { + { .addr = 0x50, .flags = 0, .buf = b0, .len = 1 }, + { .addr = 0x50, .flags = I2C_M_RD, .buf = encodedMAC, .len = 20 } + }; + + /* dprintk("%s\n", __func__); */ + + ret = i2c_transfer(adapter, msg, 2); + + if (ret != 2) /* Assume EEPROM isn't there */ + return (-ENODEV); + + return 0; +} + + +int ttpci_eeprom_parse_mac(struct i2c_adapter *adapter, u8 *proposed_mac) +{ + int ret; + u8 encodedMAC[20]; + u8 decodedMAC[6]; + + ret = ttpci_eeprom_read_encodedMAC(adapter, encodedMAC); + + if (ret != 0) { /* Will only be -ENODEV */ + dprintk("Couldn't read from EEPROM: not there?\n"); + eth_zero_addr(proposed_mac); + return ret; + } + + ret = getmac_tt(decodedMAC, encodedMAC); + if( ret != 0 ) { + dprintk("adapter failed MAC signature check\n"); + dprintk("encoded MAC from EEPROM was %*phC", + (int)sizeof(encodedMAC), &encodedMAC); + eth_zero_addr(proposed_mac); + return ret; + } + + memcpy(proposed_mac, decodedMAC, 6); + dprintk("adapter has MAC addr = %pM\n", decodedMAC); + return 0; +} + +EXPORT_SYMBOL(ttpci_eeprom_parse_mac); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ralph Metzler, Marcus Metzler, others"); +MODULE_DESCRIPTION("Decode dvb_net MAC address from EEPROM of PCI DVB cards made by Siemens, Technotrend, Hauppauge"); -- cgit v1.3.1