diff options
Diffstat (limited to 'arch/arm/mach-ux500/product.c')
| -rw-r--r-- | arch/arm/mach-ux500/product.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/product.c b/arch/arm/mach-ux500/product.c new file mode 100644 index 00000000000..014fe4b145d --- /dev/null +++ b/arch/arm/mach-ux500/product.c @@ -0,0 +1,133 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * + * Author: Jens Wiklander <jens.wiklander@stericsson.com> + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> + * Author: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> + * + * License terms: GNU General Public License (GPL) version 2 + * + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/tee.h> +#include <linux/module.h> +#include <mach/hardware.h> +#include <asm/mach-types.h> + +#define STATIC_TEE_TA_START_LOW 0xBC765EDE +#define STATIC_TEE_TA_START_MID 0x6724 +#define STATIC_TEE_TA_START_HIGH 0x11DF +#define STATIC_TEE_TA_START_CLOCKSEQ \ + {0x8E, 0x12, 0xEC, 0xDB, 0xDF, 0xD7, 0x20, 0x85} + +#define U5500_PRCMU_DBG_PWRCTRL (U5500_PRCMU_BASE + 0x4AC) +#define PRCMU_DBG_PWRCTRL_A9DBGCLKEN (1 << 4) + +static struct tee_product_config product_config; + +bool ux500_jtag_enabled(void) +{ +#ifdef CONFIG_UX500_DEBUG_NO_LAUTERBACH + return false; +#else + if (machine_is_snowball()) + return true; + if (cpu_is_u5500()) + return readl_relaxed(__io_address(U5500_PRCMU_DBG_PWRCTRL)) + & PRCMU_DBG_PWRCTRL_A9DBGCLKEN; + if (cpu_is_u8500()) + return (product_config.rt_flags & TEE_RT_FLAGS_JTAG_ENABLED) == + TEE_RT_FLAGS_JTAG_ENABLED; + + return true; +#endif +} + +static int __init product_detect(void) +{ + int err; + int origin_err; + struct tee_operation operation = { { { 0 } } }; + struct tee_context context; + struct tee_session session; + + /* Selects trustzone application needed for the job. */ + struct tee_uuid static_uuid = { + STATIC_TEE_TA_START_LOW, + STATIC_TEE_TA_START_MID, + STATIC_TEE_TA_START_HIGH, + STATIC_TEE_TA_START_CLOCKSEQ, + }; + + if (cpu_is_u5500()) + return -ENODEV; + + err = teec_initialize_context(NULL, &context); + if (err) { + pr_err("ux500-product: unable to initialize tee context," + " err = %d\n", err); + err = -EINVAL; + goto error0; + } + + err = teec_open_session(&context, &session, &static_uuid, + TEEC_LOGIN_PUBLIC, NULL, NULL, &origin_err); + if (err) { + pr_err("ux500-product: unable to open tee session," + " tee error = %d, origin error = %d\n", + err, origin_err); + err = -EINVAL; + goto error1; + } + + operation.shm[0].buffer = &product_config; + operation.shm[0].size = sizeof(product_config); + operation.shm[0].flags = TEEC_MEM_OUTPUT; + operation.flags = TEEC_MEMREF_0_USED; + + err = teec_invoke_command(&session, + TEE_STA_GET_PRODUCT_CONFIG, + &operation, &origin_err); + if (err) { + pr_err("ux500-product: fetching product settings failed, err=%d", + err); + err = -EINVAL; + goto error1; + } + + switch (product_config.product_id) { + case TEE_PRODUCT_ID_8400: + pr_info("ux500-product: u8400 detected\n"); + break; + case TEE_PRODUCT_ID_8500: + pr_info("ux500-product: u8500 detected\n"); + break; + case TEE_PRODUCT_ID_9500: + pr_info("ux500-product: u9500 detected\n"); + break; + case TEE_PRODUCT_ID_5500: + pr_info("ux500-product: u5500 detected\n"); + break; + case TEE_PRODUCT_ID_7400: + pr_info("ux500-product: u7400 detected\n"); + break; + case TEE_PRODUCT_ID_8500C: + pr_info("ux500-product: u8500C detected\n"); + break; + case TEE_PRODUCT_ID_UNKNOWN: + default: + pr_info("ux500-product: UNKNOWN! (0x%x) detected\n", + product_config.product_id); + break; + } + pr_info("ux500-product: JTAG is %s\n", + ux500_jtag_enabled() ? "enabled" : "disabled"); +error1: + (void) teec_finalize_context(&context); +error0: + return err; +} +device_initcall(product_detect); |