diff options
Diffstat (limited to 'src/soc/qualcomm/ipq806x/gsbi.c')
| -rw-r--r-- | src/soc/qualcomm/ipq806x/gsbi.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/soc/qualcomm/ipq806x/gsbi.c b/src/soc/qualcomm/ipq806x/gsbi.c new file mode 100644 index 0000000000..be75d9a043 --- /dev/null +++ b/src/soc/qualcomm/ipq806x/gsbi.c @@ -0,0 +1,115 @@ +/* + * This file is part of the depthcharge project. + * + * Copyright (C) 2014 The Linux Foundation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <arch/io.h> +#include "drivers/gpio/ipq806x.h" +#include "ipq806x_gsbi.h" + +//TODO: To be implemented as part of the iomap. +static int gsbi_base[] = { + 0x12440000, /*GSBI1*/ + 0x12480000, /*GSBI2*/ + 0x16200000, /*GSBI3*/ + 0x16300000, /*GSBI4*/ + 0x1A200000, /*GSBI5*/ + 0x16500000, /*GSBI6*/ + 0x16600000 /*GSBI7*/ +}; + +#define QUP_APPS_ADDR(N, os) ((void *)((0x009029C8+os)+(32*(N-1)))) +#define GSBI_HCLK_CTL(N) ((void *)(0x009029C0 + (32*(N-1)))) +#define GSBI_RESET(N) ((void *)(0x009029DC + (32*(N-1)))) +#define GSBI_CTL(N) ((void *)(gsbi_base[N-1])) + +#define GSBI_APPS_MD_OFFSET 0x0 +#define GSBI_APPS_NS_OFFSET 0x4 +#define GSBI_APPS_MAX_OFFSET 0xff + +#define GPIO_FUNC_I2C 0x1 + +gsbi_return_t gsbi_init(gsbi_id_t gsbi_id, gsbi_protocol_t protocol) +{ + unsigned i = 0; + unsigned qup_apps_ini[] = { + GSBI_APPS_NS_OFFSET, 0xf80b43, + GSBI_APPS_NS_OFFSET, 0xfc095b, + GSBI_APPS_NS_OFFSET, 0xfc015b, + GSBI_APPS_NS_OFFSET, 0xfc005b, + GSBI_APPS_NS_OFFSET, 0xA05, + GSBI_APPS_NS_OFFSET, 0x185, + GSBI_APPS_MD_OFFSET, 0x100fb, + GSBI_APPS_NS_OFFSET, 0xA05, + GSBI_APPS_NS_OFFSET, 0xfc015b, + GSBI_APPS_NS_OFFSET, 0xfc015b, + GSBI_APPS_NS_OFFSET, 0xfc095b, + GSBI_APPS_NS_OFFSET, 0xfc0b5b, + GSBI_APPS_MAX_OFFSET, 0x0 + }; + + gsbi_return_t ret = GSBI_SUCCESS; + + writel(0, GSBI_RESET(gsbi_id)); + + switch (gsbi_id) { + case GSBI_ID_4: { + /* Configure GPIOs 13 - SCL, 12 - SDA, 2mA gpio_en */ + gpio_tlmm_config_set(12, GPIO_FUNC_I2C, + GPIO_NO_PULL, GPIO_2MA, 1); + gpio_tlmm_config_set(13, GPIO_FUNC_I2C, + GPIO_NO_PULL, GPIO_2MA, 1); + } + break; + case GSBI_ID_1: { + /* Configure GPIOs 54 - SCL, 53 - SDA, 2mA gpio_en */ + gpio_tlmm_config_set(54, GPIO_FUNC_I2C, + GPIO_NO_PULL, GPIO_2MA, 1); + gpio_tlmm_config_set(53, GPIO_FUNC_I2C, + GPIO_NO_PULL, GPIO_2MA, 1); + } + break; + default: { + ret = GSBI_UNSUPPORTED; + goto bail_out; + } + } + + /*Select i2c protocol*/ + writel((2 << 4), GSBI_CTL(gsbi_id)); + + //TODO: Make use of clock API when available instead of the hardcoding. + /* Clock set to 24Mhz */ + for (i = 0; GSBI_APPS_MAX_OFFSET != qup_apps_ini[i]; i += 2) + writel(qup_apps_ini[i+1], + QUP_APPS_ADDR(gsbi_id, qup_apps_ini[i])); + + writel(((1 << 6)|(1 << 4)), GSBI_HCLK_CTL(gsbi_id)); + +bail_out: + return ret; +} |