diff options
Diffstat (limited to 'drivers/input/touchscreen/cyttsp4_core.c')
| -rw-r--r-- | drivers/input/touchscreen/cyttsp4_core.c | 2180 |
1 files changed, 2180 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c new file mode 100644 index 000000000..dccbcb942 --- /dev/null +++ b/drivers/input/touchscreen/cyttsp4_core.c @@ -0,0 +1,2180 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * cyttsp4_core.c + * Cypress TrueTouch(TM) Standard Product V4 Core driver module. + * For use with Cypress Txx4xx parts. + * Supported parts include: + * TMA4XX + * TMA1036 + * + * Copyright (C) 2012 Cypress Semiconductor + * + * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com> + */ + +#include "cyttsp4_core.h" +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/input/mt.h> +#include <linux/interrupt.h> +#include <linux/pm_runtime.h> +#include <linux/sched.h> +#include <linux/slab.h> + +/* Timeout in ms. */ +#define CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT 500 +#define CY_CORE_SLEEP_REQUEST_EXCLUSIVE_TIMEOUT 5000 +#define CY_CORE_MODE_CHANGE_TIMEOUT 1000 +#define CY_CORE_RESET_AND_WAIT_TIMEOUT 500 +#define CY_CORE_WAKEUP_TIMEOUT 500 + +#define CY_CORE_STARTUP_RETRY_COUNT 3 + +static const char * const cyttsp4_tch_abs_string[] = { + [CY_TCH_X] = "X", + [CY_TCH_Y] = "Y", + [CY_TCH_P] = "P", + [CY_TCH_T] = "T", + [CY_TCH_E] = "E", + [CY_TCH_O] = "O", + [CY_TCH_W] = "W", + [CY_TCH_MAJ] = "MAJ", + [CY_TCH_MIN] = "MIN", + [CY_TCH_OR] = "OR", + [CY_TCH_NUM_ABS] = "INVALID" +}; + +static const u8 ldr_exit[] = { + 0xFF, 0x01, 0x3B, 0x00, 0x00, 0x4F, 0x6D, 0x17 +}; + +static const u8 ldr_err_app[] = { + 0x01, 0x02, 0x00, 0x00, 0x55, 0xDD, 0x17 +}; + +static inline size_t merge_bytes(u8 high, u8 low) +{ + return (high << 8) + low; +} + +#ifdef VERBOSE_DEBUG +static void cyttsp4_pr_buf(struct device *dev, u8 *pr_buf, u8 *dptr, int size, + const char *data_name) +{ + int i, k; + const char fmt[] = "%02X "; + int max; + + if (!size) + return; + + max = (CY_MAX_PRBUF_SIZE - 1) - sizeof(CY_PR_TRUNCATED); + + pr_buf[0] = 0; + for (i = k = 0; i < size && k < max; i++, k += 3) + scnprintf(pr_buf + k, CY_MAX_PRBUF_SIZE, fmt, dptr[i]); + + dev_vdbg(dev, "%s: %s[0..%d]=%s%s\n", __func__, data_name, size - 1, + pr_buf, size <= max ? "" : CY_PR_TRUNCATED); +} +#else +#define cyttsp4_pr_buf(dev, pr_buf, dptr, size, data_name) do { } while (0) +#endif + +static int cyttsp4_load_status_regs(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + struct device *dev = cd->dev; + int rc; + + rc = cyttsp4_adap_read(cd, CY_REG_BASE, si->si_ofs.mode_size, + si->xy_mode); + if (rc < 0) + dev_err(dev, "%s: fail read mode regs r=%d\n", + __func__, rc); + else + cyttsp4_pr_buf(dev, cd->pr_buf, si->xy_mode, + si->si_ofs.mode_size, "xy_mode"); + + return rc; +} + +static int cyttsp4_handshake(struct cyttsp4 *cd, u8 mode) +{ + u8 cmd = mode ^ CY_HST_TOGGLE; + int rc; + + /* + * Mode change issued, handshaking now will cause endless mode change + * requests, for sync mode modechange will do same with handshake + * */ + if (mode & CY_HST_MODE_CHANGE) + return 0; + + rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(cmd), &cmd); + if (rc < 0) + dev_err(cd->dev, "%s: bus write fail on handshake (ret=%d)\n", + __func__, rc); + + return rc; +} + +static int cyttsp4_hw_soft_reset(struct cyttsp4 *cd) +{ + u8 cmd = CY_HST_RESET; + int rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(cmd), &cmd); + if (rc < 0) { + dev_err(cd->dev, "%s: FAILED to execute SOFT reset\n", + __func__); + return rc; + } + return 0; +} + +static int cyttsp4_hw_hard_reset(struct cyttsp4 *cd) +{ + if (cd->cpdata->xres) { + cd->cpdata->xres(cd->cpdata, cd->dev); + dev_dbg(cd->dev, "%s: execute HARD reset\n", __func__); + return 0; + } + dev_err(cd->dev, "%s: FAILED to execute HARD reset\n", __func__); + return -ENOSYS; +} + +static int cyttsp4_hw_reset(struct cyttsp4 *cd) +{ + int rc = cyttsp4_hw_hard_reset(cd); + if (rc == -ENOSYS) + rc = cyttsp4_hw_soft_reset(cd); + return rc; +} + +/* + * Gets number of bits for a touch filed as parameter, + * sets maximum value for field which is used as bit mask + * and returns number of bytes required for that field + */ +static int cyttsp4_bits_2_bytes(unsigned int nbits, size_t *max) +{ + *max = 1UL << nbits; + return (nbits + 7) / 8; +} + +static int cyttsp4_si_data_offsets(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + int rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(si->si_data), + &si->si_data); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read sysinfo data offsets r=%d\n", + __func__, rc); + return rc; + } + + /* Print sysinfo data offsets */ + cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)&si->si_data, + sizeof(si->si_data), "sysinfo_data_offsets"); + + /* convert sysinfo data offset bytes into integers */ + + si->si_ofs.map_sz = merge_bytes(si->si_data.map_szh, + si->si_data.map_szl); + si->si_ofs.map_sz = merge_bytes(si->si_data.map_szh, + si->si_data.map_szl); + si->si_ofs.cydata_ofs = merge_bytes(si->si_data.cydata_ofsh, + si->si_data.cydata_ofsl); + si->si_ofs.test_ofs = merge_bytes(si->si_data.test_ofsh, + si->si_data.test_ofsl); + si->si_ofs.pcfg_ofs = merge_bytes(si->si_data.pcfg_ofsh, + si->si_data.pcfg_ofsl); + si->si_ofs.opcfg_ofs = merge_bytes(si->si_data.opcfg_ofsh, + si->si_data.opcfg_ofsl); + si->si_ofs.ddata_ofs = merge_bytes(si->si_data.ddata_ofsh, + si->si_data.ddata_ofsl); + si->si_ofs.mdata_ofs = merge_bytes(si->si_data.mdata_ofsh, + si->si_data.mdata_ofsl); + return rc; +} + +static int cyttsp4_si_get_cydata(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + int read_offset; + int mfgid_sz, calc_mfgid_sz; + void *p; + int rc; + + if (si->si_ofs.test_ofs <= si->si_ofs.cydata_ofs) { + dev_err(cd->dev, + "%s: invalid offset test_ofs: %zu, cydata_ofs: %zu\n", + __func__, si->si_ofs.test_ofs, si->si_ofs.cydata_ofs); + return -EINVAL; + } + + si->si_ofs.cydata_size = si->si_ofs.test_ofs - si->si_ofs.cydata_ofs; + dev_dbg(cd->dev, "%s: cydata size: %zd\n", __func__, + si->si_ofs.cydata_size); + + p = krealloc(si->si_ptrs.cydata, si->si_ofs.cydata_size, GFP_KERNEL); + if (p == NULL) { + dev_err(cd->dev, "%s: failed to allocate cydata memory\n", + __func__); + return -ENOMEM; + } + si->si_ptrs.cydata = p; + + read_offset = si->si_ofs.cydata_ofs; + + /* Read the CYDA registers up to MFGID field */ + rc = cyttsp4_adap_read(cd, read_offset, + offsetof(struct cyttsp4_cydata, mfgid_sz) + + sizeof(si->si_ptrs.cydata->mfgid_sz), + si->si_ptrs.cydata); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read cydata r=%d\n", + __func__, rc); + return rc; + } + + /* Check MFGID size */ + mfgid_sz = si->si_ptrs.cydata->mfgid_sz; + calc_mfgid_sz = si->si_ofs.cydata_size - sizeof(struct cyttsp4_cydata); + if (mfgid_sz != calc_mfgid_sz) { + dev_err(cd->dev, "%s: mismatch in MFGID size, reported:%d calculated:%d\n", + __func__, mfgid_sz, calc_mfgid_sz); + return -EINVAL; + } + + read_offset += offsetof(struct cyttsp4_cydata, mfgid_sz) + + sizeof(si->si_ptrs.cydata->mfgid_sz); + + /* Read the CYDA registers for MFGID field */ + rc = cyttsp4_adap_read(cd, read_offset, si->si_ptrs.cydata->mfgid_sz, + si->si_ptrs.cydata->mfg_id); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read cydata r=%d\n", + __func__, rc); + return rc; + } + + read_offset += si->si_ptrs.cydata->mfgid_sz; + + /* Read the rest of the CYDA registers */ + rc = cyttsp4_adap_read(cd, read_offset, + sizeof(struct cyttsp4_cydata) + - offsetof(struct cyttsp4_cydata, cyito_idh), + &si->si_ptrs.cydata->cyito_idh); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read cydata r=%d\n", + __func__, rc); + return rc; + } + + cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)si->si_ptrs.cydata, + si->si_ofs.cydata_size, "sysinfo_cydata"); + return rc; +} + +static int cyttsp4_si_get_test_data(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + void *p; + int rc; + + if (si->si_ofs.pcfg_ofs <= si->si_ofs.test_ofs) { + dev_err(cd->dev, + "%s: invalid offset pcfg_ofs: %zu, test_ofs: %zu\n", + __func__, si->si_ofs.pcfg_ofs, si->si_ofs.test_ofs); + return -EINVAL; + } + + si->si_ofs.test_size = si->si_ofs.pcfg_ofs - si->si_ofs.test_ofs; + + p = krealloc(si->si_ptrs.test, si->si_ofs.test_size, GFP_KERNEL); + if (p == NULL) { + dev_err(cd->dev, "%s: failed to allocate test memory\n", + __func__); + return -ENOMEM; + } + si->si_ptrs.test = p; + + rc = cyttsp4_adap_read(cd, si->si_ofs.test_ofs, si->si_ofs.test_size, + si->si_ptrs.test); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read test data r=%d\n", + __func__, rc); + return rc; + } + + cyttsp4_pr_buf(cd->dev, cd->pr_buf, + (u8 *)si->si_ptrs.test, si->si_ofs.test_size, + "sysinfo_test_data"); + if (si->si_ptrs.test->post_codel & + CY_POST_CODEL_WDG_RST) + dev_info(cd->dev, "%s: %s codel=%02X\n", + __func__, "Reset was a WATCHDOG RESET", + si->si_ptrs.test->post_codel); + + if (!(si->si_ptrs.test->post_codel & + CY_POST_CODEL_CFG_DATA_CRC_FAIL)) + dev_info(cd->dev, "%s: %s codel=%02X\n", __func__, + "Config Data CRC FAIL", + si->si_ptrs.test->post_codel); + + if (!(si->si_ptrs.test->post_codel & + CY_POST_CODEL_PANEL_TEST_FAIL)) + dev_info(cd->dev, "%s: %s codel=%02X\n", + __func__, "PANEL TEST FAIL", + si->si_ptrs.test->post_codel); + + dev_info(cd->dev, "%s: SCANNING is %s codel=%02X\n", + __func__, si->si_ptrs.test->post_codel & 0x08 ? + "ENABLED" : "DISABLED", + si->si_ptrs.test->post_codel); + return rc; +} + +static int cyttsp4_si_get_pcfg_data(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + void *p; + int rc; + + if (si->si_ofs.opcfg_ofs <= si->si_ofs.pcfg_ofs) { + dev_err(cd->dev, + "%s: invalid offset opcfg_ofs: %zu, pcfg_ofs: %zu\n", + __func__, si->si_ofs.opcfg_ofs, si->si_ofs.pcfg_ofs); + return -EINVAL; + } + + si->si_ofs.pcfg_size = si->si_ofs.opcfg_ofs - si->si_ofs.pcfg_ofs; + + p = krealloc(si->si_ptrs.pcfg, si->si_ofs.pcfg_size, GFP_KERNEL); + if (p == NULL) { + dev_err(cd->dev, "%s: failed to allocate pcfg memory\n", + __func__); + return -ENOMEM; + } + si->si_ptrs.pcfg = p; + + rc = cyttsp4_adap_read(cd, si->si_ofs.pcfg_ofs, si->si_ofs.pcfg_size, + si->si_ptrs.pcfg); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read pcfg data r=%d\n", + __func__, rc); + return rc; + } + + si->si_ofs.max_x = merge_bytes((si->si_ptrs.pcfg->res_xh + & CY_PCFG_RESOLUTION_X_MASK), si->si_ptrs.pcfg->res_xl); + si->si_ofs.x_origin = !!(si->si_ptrs.pcfg->res_xh + & CY_PCFG_ORIGIN_X_MASK); + si->si_ofs.max_y = merge_bytes((si->si_ptrs.pcfg->res_yh + & CY_PCFG_RESOLUTION_Y_MASK), si->si_ptrs.pcfg->res_yl); + si->si_ofs.y_origin = !!(si->si_ptrs.pcfg->res_yh + & CY_PCFG_ORIGIN_Y_MASK); + si->si_ofs.max_p = merge_bytes(si->si_ptrs.pcfg->max_zh, + si->si_ptrs.pcfg->max_zl); + + cyttsp4_pr_buf(cd->dev, cd->pr_buf, + (u8 *)si->si_ptrs.pcfg, + si->si_ofs.pcfg_size, "sysinfo_pcfg_data"); + return rc; +} + +static int cyttsp4_si_get_opcfg_data(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + struct cyttsp4_tch_abs_params *tch; + struct cyttsp4_tch_rec_params *tch_old, *tch_new; + enum cyttsp4_tch_abs abs; + int i; + void *p; + int rc; + + if (si->si_ofs.ddata_ofs <= si->si_ofs.opcfg_ofs) { + dev_err(cd->dev, + "%s: invalid offset ddata_ofs: %zu, opcfg_ofs: %zu\n", + __func__, si->si_ofs.ddata_ofs, si->si_ofs.opcfg_ofs); + return -EINVAL; + } + + si->si_ofs.opcfg_size = si->si_ofs.ddata_ofs - si->si_ofs.opcfg_ofs; + + p = krealloc(si->si_ptrs.opcfg, si->si_ofs.opcfg_size, GFP_KERNEL); + if (p == NULL) { + dev_err(cd->dev, "%s: failed to allocate opcfg memory\n", + __func__); + return -ENOMEM; + } + si->si_ptrs.opcfg = p; + + rc = cyttsp4_adap_read(cd, si->si_ofs.opcfg_ofs, si->si_ofs.opcfg_size, + si->si_ptrs.opcfg); + if (rc < 0) { + dev_err(cd->dev, "%s: fail read opcfg data r=%d\n", + __func__, rc); + return rc; + } + si->si_ofs.cmd_ofs = si->si_ptrs.opcfg->cmd_ofs; + si->si_ofs.rep_ofs = si->si_ptrs.opcfg->rep_ofs; + si->si_ofs.rep_sz = (si->si_ptrs.opcfg->rep_szh * 256) + + si->si_ptrs.opcfg->rep_szl; + si->si_ofs.num_btns = si->si_ptrs.opcfg->num_btns; + si->si_ofs.num_btn_regs = (si->si_ofs.num_btns + + CY_NUM_BTN_PER_REG - 1) / CY_NUM_BTN_PER_REG; + si->si_ofs.tt_stat_ofs = si->si_ptrs.opcfg->tt_stat_ofs; + si->si_ofs.obj_cfg0 = si->si_ptrs.opcfg->obj_cfg0; + si->si_ofs.max_tchs = si->si_ptrs.opcfg->max_tchs & + CY_BYTE_OFS_MASK; + si->si_ofs.tch_rec_size = si->si_ptrs.opcfg->tch_rec_size & + CY_BYTE_OFS_MASK; + + /* Get the old touch fields */ + for (abs = CY_TCH_X; abs < CY_NUM_TCH_FIELDS; abs++) { + tch = &si->si_ofs.tch_abs[abs]; + tch_old = &si->si_ptrs.opcfg->tch_rec_old[abs]; + + tch->ofs = tch_old->loc & CY_BYTE_OFS_MASK; + tch->size = cyttsp4_bits_2_bytes(tch_old->size, + &tch->max); + tch->bofs = (tch_old->loc & CY_BOFS_MASK) >> CY_BOFS_SHIFT; + } + + /* button fields */ + si->si_ofs.btn_rec_size = si->si_ptrs.opcfg->btn_rec_size; + si->si_ofs.btn_diff_ofs = si->si_ptrs.opcfg->btn_diff_ofs; + si->si_ofs.btn_diff_size = si->si_ptrs.opcfg->btn_diff_size; + + if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) { + /* Get the extended touch fields */ + for (i = 0; i < CY_NUM_EXT_TCH_FIELDS; abs++, i++) { + tch = &si->si_ofs.tch_abs[abs]; + tch_new = &si->si_ptrs.opcfg->tch_rec_new[i]; + + tch->ofs = tch_new->loc & CY_BYTE_OFS_MASK; + tch->size = cyttsp4_bits_2_bytes(tch_new->size, + &tch->max); + tch->bofs = (tch_new->loc & CY_BOFS_MASK) >> CY_BOFS_SHIFT; + } + } + + for (abs = 0; abs < CY_TCH_NUM_ABS; abs++) { + dev_dbg(cd->dev, "%s: tch_rec_%s\n", __func__, + cyttsp4_tch_abs_string[abs]); + dev_dbg(cd->dev, "%s: ofs =%2zd\n", __func__, + si->si_ofs.tch_abs[abs].ofs); + dev_dbg(cd->dev, "%s: siz =%2zd\n", __func__, + si->si_ofs.tch_abs[abs].size); + dev_dbg(cd->dev, "%s: max =%2zd\n", __func__, + si->si_ofs.tch_abs[abs].max); + dev_dbg(cd->dev, "%s: bofs=%2zd\n", __func__, + si->si_ofs.tch_abs[abs].bofs); + } + + si->si_ofs.mode_size = si->si_ofs.tt_stat_ofs + 1; + si->si_ofs.data_size = si->si_ofs.max_tchs * + si->si_ptrs.opcfg->tch_rec_size; + + cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)si->si_ptrs.opcfg, + si->si_ofs.opcfg_size, "sysinfo_opcfg_data"); + + return 0; +} + +static int cyttsp4_si_get_ddata(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + void *p; + int rc; + + si->si_ofs.ddata_size = si->si_ofs.mdata_ofs - si->si_ofs.ddata_ofs; + + p = krealloc(si->si_ptrs.ddata, si->si_ofs.ddata_size, GFP_KERNEL); + if (p == NULL) { + dev_err(cd->dev, "%s: fail alloc ddata memory\n", __func__); + return -ENOMEM; + } + si->si_ptrs.ddata = p; + + rc = cyttsp4_adap_read(cd, si->si_ofs.ddata_ofs, si->si_ofs.ddata_size, + si->si_ptrs.ddata); + if (rc < 0) + dev_err(cd->dev, "%s: fail read ddata data r=%d\n", + __func__, rc); + else + cyttsp4_pr_buf(cd->dev, cd->pr_buf, + (u8 *)si->si_ptrs.ddata, + si->si_ofs.ddata_size, "sysinfo_ddata"); + return rc; +} + +static int cyttsp4_si_get_mdata(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + void *p; + int rc; + + si->si_ofs.mdata_size = si->si_ofs.map_sz - si->si_ofs.mdata_ofs; + + p = krealloc(si->si_ptrs.mdata, si->si_ofs.mdata_size, GFP_KERNEL); + if (p == NULL) { + dev_err(cd->dev, "%s: fail alloc mdata memory\n", __func__); + return -ENOMEM; + } + si->si_ptrs.mdata = p; + + rc = cyttsp4_adap_read(cd, si->si_ofs.mdata_ofs, si->si_ofs.mdata_size, + si->si_ptrs.mdata); + if (rc < 0) + dev_err(cd->dev, "%s: fail read mdata data r=%d\n", + __func__, rc); + else + cyttsp4_pr_buf(cd->dev, cd->pr_buf, + (u8 *)si->si_ptrs.mdata, + si->si_ofs.mdata_size, "sysinfo_mdata"); + return rc; +} + +static int cyttsp4_si_get_btn_data(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + int btn; + int num_defined_keys; + u16 *key_table; + void *p; + int rc = 0; + + if (si->si_ofs.num_btns) { + si->si_ofs.btn_keys_size = si->si_ofs.num_btns * + sizeof(struct cyttsp4_btn); + + p = krealloc(si->btn, si->si_ofs.btn_keys_size, + GFP_KERNEL|__GFP_ZERO); + if (p == NULL) { + dev_err(cd->dev, "%s: %s\n", __func__, + "fail alloc btn_keys memory"); + return -ENOMEM; + } + si->btn = p; + + if (cd->cpdata->sett[CY_IC_GRPNUM_BTN_KEYS] == NULL) + num_defined_keys = 0; + else if (cd->cpdata->sett[CY_IC_GRPNUM_BTN_KEYS]->data == NULL) + num_defined_keys = 0; + else + num_defined_keys = cd->cpdata->sett + [CY_IC_GRPNUM_BTN_KEYS]->size; + + for (btn = 0; btn < si->si_ofs.num_btns && + btn < num_defined_keys; btn++) { + key_table = (u16 *)cd->cpdata->sett + [CY_IC_GRPNUM_BTN_KEYS]->data; + si->btn[btn].key_code = key_table[btn]; + si->btn[btn].state = CY_BTN_RELEASED; + si->btn[btn].enabled = true; + } + for (; btn < si->si_ofs.num_btns; btn++) { + si->btn[btn].key_code = KEY_RESERVED; + si->btn[btn].state = CY_BTN_RELEASED; + si->btn[btn].enabled = true; + } + + return rc; + } + + si->si_ofs.btn_keys_size = 0; + kfree(si->btn); + si->btn = NULL; + return rc; +} + +static int cyttsp4_si_get_op_data_ptrs(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + void *p; + + p = krealloc(si->xy_mode, si->si_ofs.mode_size, GFP_KERNEL|__GFP_ZERO); + if (p == NULL) + return -ENOMEM; + si->xy_mode = p; + + p = krealloc(si->xy_data, si->si_ofs.data_size, GFP_KERNEL|__GFP_ZERO); + if (p == NULL) + return -ENOMEM; + si->xy_data = p; + + p = krealloc(si->btn_rec_data, + si->si_ofs.btn_rec_size * si->si_ofs.num_btns, + GFP_KERNEL|__GFP_ZERO); + if (p == NULL) + return -ENOMEM; + si->btn_rec_data = p; + + return 0; +} + +static void cyttsp4_si_put_log_data(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + dev_dbg(cd->dev, "%s: cydata_ofs =%4zd siz=%4zd\n", __func__, + si->si_ofs.cydata_ofs, si->si_ofs.cydata_size); + dev_dbg(cd->dev, "%s: test_ofs =%4zd siz=%4zd\n", __func__, + si->si_ofs.test_ofs, si->si_ofs.test_size); + dev_dbg(cd->dev, "%s: pcfg_ofs =%4zd siz=%4zd\n", __func__, + si->si_ofs.pcfg_ofs, si->si_ofs.pcfg_size); + dev_dbg(cd->dev, "%s: opcfg_ofs =%4zd siz=%4zd\n", __func__, + si->si_ofs.opcfg_ofs, si->si_ofs.opcfg_size); + dev_dbg(cd->dev, "%s: ddata_ofs =%4zd siz=%4zd\n", __func__, + si->si_ofs.ddata_ofs, si->si_ofs.ddata_size); + dev_dbg(cd->dev, "%s: mdata_ofs =%4zd siz=%4zd\n", __func__, + si->si_ofs.mdata_ofs, si->si_ofs.mdata_size); + + dev_dbg(cd->dev, "%s: cmd_ofs =%4zd\n", __func__, + si->si_ofs.cmd_ofs); + dev_dbg(cd->dev, "%s: rep_ofs =%4zd\n", __func__, + si->si_ofs.rep_ofs); + dev_dbg(cd->dev, "%s: rep_sz =%4zd\n", __func__, + si->si_ofs.rep_sz); + dev_dbg(cd->dev, "%s: num_btns =%4zd\n", __func__, + si->si_ofs.num_btns); + dev_dbg(cd->dev, "%s: num_btn_regs =%4zd\n", __func__, + si->si_ofs.num_btn_regs); + dev_dbg(cd->dev, "%s: tt_stat_ofs =%4zd\n", __func__, + si->si_ofs.tt_stat_ofs); + dev_dbg(cd->dev, "%s: tch_rec_size =%4zd\n", __func__, + si->si_ofs.tch_rec_size); + dev_dbg(cd->dev, "%s: max_tchs =%4zd\n", __func__, + si->si_ofs.max_tchs); + dev_dbg(cd->dev, "%s: mode_size =%4zd\n", __func__, + si->si_ofs.mode_size); + dev_dbg(cd->dev, "%s: data_size =%4zd\n", __func__, + si->si_ofs.data_size); + dev_dbg(cd->dev, "%s: map_sz =%4zd\n", __func__, + si->si_ofs.map_sz); + + dev_dbg(cd->dev, "%s: btn_rec_size =%2zd\n", __func__, + si->si_ofs.btn_rec_size); + dev_dbg(cd->dev, "%s: btn_diff_ofs =%2zd\n", __func__, + si->si_ofs.btn_diff_ofs); + dev_dbg(cd->dev, "%s: btn_diff_size =%2zd\n", __func__, + si->si_ofs.btn_diff_size); + + dev_dbg(cd->dev, "%s: max_x = 0x%04zX (%zd)\n", __func__, + si->si_ofs.max_x, si->si_ofs.max_x); + dev_dbg(cd->dev, "%s: x_origin = %zd (%s)\n", __func__, + si->si_ofs.x_origin, + si->si_ofs.x_origin == CY_NORMAL_ORIGIN ? + "left corner" : "right corner"); + dev_dbg(cd->dev, "%s: max_y = 0x%04zX (%zd)\n", __func__, + si->si_ofs.max_y, si->si_ofs.max_y); + dev_dbg(cd->dev, "%s: y_origin = %zd (%s)\n", __func__, + si->si_ofs.y_origin, + si->si_ofs.y_origin == CY_NORMAL_ORIGIN ? + "upper corner" : "lower corner"); + dev_dbg(cd->dev, "%s: max_p = 0x%04zX (%zd)\n", __func__, + si->si_ofs.max_p, si->si_ofs.max_p); + + dev_dbg(cd->dev, "%s: xy_mode=%p xy_data=%p\n", __func__, + si->xy_mode, si->xy_data); +} + +static int cyttsp4_get_sysinfo_regs(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + int rc; + + rc = cyttsp4_si_data_offsets(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_cydata(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_test_data(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_pcfg_data(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_opcfg_data(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_ddata(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_mdata(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_btn_data(cd); + if (rc < 0) + return rc; + + rc = cyttsp4_si_get_op_data_ptrs(cd); + if (rc < 0) { + dev_err(cd->dev, "%s: failed to get_op_data\n", + __func__); + return rc; + } + + cyttsp4_si_put_log_data(cd); + + /* provide flow control handshake */ + rc = cyttsp4_handshake(cd, si->si_data.hst_mode); + if (rc < 0) + dev_err(cd->dev, "%s: handshake fail on sysinfo reg\n", + __func__); + + si->ready = true; + return rc; +} + +static void cyttsp4_queue_startup_(struct cyttsp4 *cd) +{ + if (cd->startup_state == STARTUP_NONE) { + cd->startup_state = STARTUP_QUEUED; + schedule_work(&cd->startup_work); + dev_dbg(cd->dev, "%s: cyttsp4_startup queued\n", __func__); + } else { + dev_dbg(cd->dev, "%s: startup_state = %d\n", __func__, + cd->startup_state); + } +} + +static void cyttsp4_report_slot_liftoff(struct cyttsp4_mt_data *md, + int max_slots) +{ + int t; + + if (md->num_prv_tch == 0) + return; + + for (t = 0; t < max_slots; t++) { + input_mt_slot(md->input, t); + input_mt_report_slot_inactive(md->input); + } +} + +static void cyttsp4_lift_all(struct cyttsp4_mt_data *md) +{ + if (!md->si) + return; + + if (md->num_prv_tch != 0) { + cyttsp4_report_slot_liftoff(md, + md->si->si_ofs.tch_abs[CY_TCH_T].max); + input_sync(md->input); + md->num_prv_tch = 0; + } +} + +static void cyttsp4_get_touch_axis(struct cyttsp4_mt_data *md, + int *axis, int size, int max, u8 *xy_data, int bofs) +{ + int nbyte; + int next; + + for (nbyte = 0, *axis = 0, next = 0; nbyte < size; nbyte++) { + dev_vdbg(&md->input->dev, + "%s: *axis=%02X(%d) size=%d max=%08X xy_data=%p" + " xy_data[%d]=%02X(%d) bofs=%d\n", + __func__, *axis, *axis, size, max, xy_data, next, + xy_data[next], xy_data[next], bofs); + *axis = (*axis * 256) + (xy_data[next] >> bofs); + next++; + } + + *axis &= max - 1; + + dev_vdbg(&md->input->dev, + "%s: *axis=%02X(%d) size=%d max=%08X xy_data=%p" + " xy_data[%d]=%02X(%d)\n", + __func__, *axis, *axis, size, max, xy_data, next, + xy_data[next], xy_data[next]); +} + +static void cyttsp4_get_touch(struct cyttsp4_mt_data *md, + struct cyttsp4_touch *touch, u8 *xy_data) +{ + struct device *dev = &md->input->dev; + struct cyttsp4_sysinfo *si = md->si; + enum cyttsp4_tch_abs abs; + bool flipped; + + for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) { + cyttsp4_get_touch_axis(md, &touch->abs[abs], + si->si_ofs.tch_abs[abs].size, + si->si_ofs.tch_abs[abs].max, + xy_data + si->si_ofs.tch_abs[abs].ofs, + si->si_ofs.tch_abs[abs].bofs); + dev_vdbg(dev, "%s: get %s=%04X(%d)\n", __func__, + cyttsp4_tch_abs_string[abs], + touch->abs[abs], touch->abs[abs]); + } + + if (md->pdata->flags & CY_FLAG_FLIP) { + swap(touch->abs[CY_TCH_X], touch->abs[CY_TCH_Y]); + flipped = true; + } else + flipped = false; + + if (md->pdata->flags & CY_FLAG_INV_X) { + if (flipped) + touch->abs[CY_TCH_X] = md->si->si_ofs.max_y - + touch->abs[CY_TCH_X]; + else + touch->abs[CY_TCH_X] = md->si->si_ofs.max_x - + touch->abs[CY_TCH_X]; + } + if (md->pdata->flags & CY_FLAG_INV_Y) { + if (flipped) + touch->abs[CY_TCH_Y] = md->si->si_ofs.max_x - + touch->abs[CY_TCH_Y]; + else + touch->abs[CY_TCH_Y] = md->si->si_ofs.max_y - + touch->abs[CY_TCH_Y]; + } + + dev_vdbg(dev, "%s: flip=%s inv-x=%s inv-y=%s x=%04X(%d) y=%04X(%d)\n", + __func__, flipped ? "true" : "false", + md->pdata->flags & CY_FLAG_INV_X ? "true" : "false", + md->pdata->flags & CY_FLAG_INV_Y ? "true" : "false", + touch->abs[CY_TCH_X], touch->abs[CY_TCH_X], + touch->abs[CY_TCH_Y], touch->abs[CY_TCH_Y]); +} + +static void cyttsp4_final_sync(struct input_dev *input, int max_slots, int *ids) +{ + int t; + + for (t = 0; t < max_slots; t++) { + if (ids[t]) + continue; + input_mt_slot(input, t); + input_mt_report_slot_inactive(input); + } + + input_sync(input); +} + +static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch) +{ + struct device *dev = &md->input->dev; + struct cyttsp4_sysinfo *si = md->si; + struct cyttsp4_touch tch; + int sig; + int i, j, t = 0; + int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)]; + + memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int)); + for (i = 0; i < num_cur_tch; i++) { + cyttsp4_get_touch(md, &tch, si->xy_data + + (i * si->si_ofs.tch_rec_size)); + if ((tch.abs[CY_TCH_T] < md->pdata->frmwrk->abs + [(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MIN_OST]) || + (tch.abs[CY_TCH_T] > md->pdata->frmwrk->abs + [(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MAX_OST])) { + dev_err(dev, "%s: tch=%d -> bad trk_id=%d max_id=%d\n", + __func__, i, tch.abs[CY_TCH_T], + md->pdata->frmwrk->abs[(CY_ABS_ID_OST * + CY_NUM_ABS_SET) + CY_MAX_OST]); + continue; + } + + /* use 0 based track id's */ + sig = md->pdata->frmwrk->abs + [(CY_ABS_ID_OST * CY_NUM_ABS_SET) + 0]; + if (sig != CY_IGNORE_VALUE) { + t = tch.abs[CY_TCH_T] - md->pdata->frmwrk->abs + [(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MIN_OST]; + if (tch.abs[CY_TCH_E] == CY_EV_LIFTOFF) { + dev_dbg(dev, "%s: t=%d e=%d lift-off\n", + __func__, t, tch.abs[CY_TCH_E]); + goto cyttsp4_get_mt_touches_pr_tch; + } + input_mt_slot(md->input, t); + input_mt_report_slot_state(md->input, MT_TOOL_FINGER, + true); + ids[t] = true; + } + + /* all devices: position and pressure fields */ + for (j = 0; j <= CY_ABS_W_OST; j++) { + sig = md->pdata->frmwrk->abs[((CY_ABS_X_OST + j) * + CY_NUM_ABS_SET) + 0]; + if (sig != CY_IGNORE_VALUE) + input_report_abs(md->input, sig, + tch.abs[CY_TCH_X + j]); + } + if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) { + /* + * TMA400 size and orientation fields: + * if pressure is non-zero and major touch + * signal is zero, then set major and minor touch + * signals to minimum non-zero value + */ + if (tch.abs[CY_TCH_P] > 0 && tch.abs[CY_TCH_MAJ] == 0) + tch.abs[CY_TCH_MAJ] = tch.abs[CY_TCH_MIN] = 1; + + /* Get the extended touch fields */ + for (j = 0; j < CY_NUM_EXT_TCH_FIELDS; j++) { + sig = md->pdata->frmwrk->abs + [((CY_ABS_MAJ_OST + j) * + CY_NUM_ABS_SET) + 0]; + if (sig != CY_IGNORE_VALUE) + input_report_abs(md->input, sig, + tch.abs[CY_TCH_MAJ + j]); + } + } + +cyttsp4_get_mt_touches_pr_tch: + if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) + dev_dbg(dev, + "%s: t=%d x=%d y=%d z=%d M=%d m=%d o=%d e=%d\n", + __func__, t, + tch.abs[CY_TCH_X], + tch.abs[CY_TCH_Y], + tch.abs[CY_TCH_P], + tch.abs[CY_TCH_MAJ], + tch.abs[CY_TCH_MIN], + tch.abs[CY_TCH_OR], + tch.abs[CY_TCH_E]); + else + dev_dbg(dev, + "%s: t=%d x=%d y=%d z=%d e=%d\n", __func__, + t, + tch.abs[CY_TCH_X], + tch.abs[CY_TCH_Y], + tch.abs[CY_TCH_P], + tch.abs[CY_TCH_E]); + } + + cyttsp4_final_sync(md->input, si->si_ofs.tch_abs[CY_TCH_T].max, ids); + + md->num_prv_tch = num_cur_tch; + + return; +} + +/* read xy_data for all current touches */ +static int cyttsp4_xy_worker(struct cyttsp4 *cd) +{ + struct cyttsp4_mt_data *md = &cd->md; + struct device *dev = &md->input->dev; + struct cyttsp4_sysinfo *si = md->si; + u8 num_cur_tch; + u8 hst_mode; + u8 rep_len; + u8 rep_stat; + u8 tt_stat; + int rc = 0; + + /* + * Get event data from cyttsp4 device. + * The event data includes all data + * for all active touches. + * Event data also includes button data + */ + /* + * Use 2 reads: + * 1st read to get mode + button bytes + touch count (core) + * 2nd read (optional) to get touch 1 - touch n data + */ + hst_mode = si->xy_mode[CY_REG_BASE]; + rep_len = si->xy_mode[si->si_ofs.rep_ofs]; + rep_stat = si->xy_mode[si->si_ofs.rep_ofs + 1]; + tt_stat = si->xy_mode[si->si_ofs.tt_stat_ofs]; + dev_vdbg(dev, "%s: %s%02X %s%d %s%02X %s%02X\n", __func__, + "hst_mode=", hst_mode, "rep_len=", rep_len, + "rep_stat=", rep_stat, "tt_stat=", tt_stat); + + num_cur_tch = GET_NUM_TOUCHES(tt_stat); + dev_vdbg(dev, "%s: num_cur_tch=%d\n", __func__, num_cur_tch); + + if (rep_len == 0 && num_cur_tch > 0) { + dev_err(dev, "%s: report length error rep_len=%d num_tch=%d\n", + __func__, rep_len, num_cur_tch); + goto cyttsp4_xy_worker_exit; + } + + /* read touches */ + if (num_cur_tch > 0) { + rc = cyttsp4_adap_read(cd, si->si_ofs.tt_stat_ofs + 1, + num_cur_tch * si->si_ofs.tch_rec_size, + si->xy_data); + if (rc < 0) { + dev_err(dev, "%s: read fail on touch regs r=%d\n", + __func__, rc); + goto cyttsp4_xy_worker_exit; + } + } + + /* print xy data */ + cyttsp4_pr_buf(dev, cd->pr_buf, si->xy_data, num_cur_tch * + si->si_ofs.tch_rec_size, "xy_data"); + + /* check any error conditions */ + if (IS_BAD_PKT(rep_stat)) { + dev_dbg(dev, "%s: Invalid buffer detected\n", __func__); + rc = 0; + goto cyttsp4_xy_worker_exit; + } + + if (IS_LARGE_AREA(tt_stat)) + dev_dbg(dev, "%s: Large area detected\n", __func__); + + if (num_cur_tch > si->si_ofs.max_tchs) { + dev_err(dev, "%s: too many tch; set to max tch (n=%d c=%zd)\n", + __func__, num_cur_tch, si->si_ofs.max_tchs); + num_cur_tch = si->si_ofs.max_tchs; + } + + /* extract xy_data for all currently reported touches */ + dev_vdbg(dev, "%s: extract data num_cur_tch=%d\n", __func__, + num_cur_tch); + if (num_cur_tch) + cyttsp4_get_mt_touches(md, num_cur_tch); + else + cyttsp4_lift_all(md); + + rc = 0; + +cyttsp4_xy_worker_exit: + return rc; +} + +static int cyttsp4_mt_attention(struct cyttsp4 *cd) +{ + struct device *dev = cd->dev; + struct cyttsp4_mt_data *md = &cd->md; + int rc = 0; + + if (!md->si) + return 0; + + mutex_lock(&md->report_lock); + if (!md->is_suspended) { + /* core handles handshake */ + rc = cyttsp4_xy_worker(cd); + } else { + dev_vdbg(dev, "%s: Ignoring report while suspended\n", + __func__); + } + mutex_unlock(&md->report_lock); + if (rc < 0) + dev_err(dev, "%s: xy_worker error r=%d\n", __func__, rc); + + return rc; +} + +static irqreturn_t cyttsp4_irq(int irq, void *handle) +{ + struct cyttsp4 *cd = handle; + struct device *dev = cd->dev; + enum cyttsp4_mode cur_mode; + u8 cmd_ofs = cd->sysinfo.si_ofs.cmd_ofs; + u8 mode[3]; + int rc; + + /* + * Check whether this IRQ should be ignored (external) + * This should be the very first thing to check since + * ignore_irq may be set for a very short period of time + */ + if (atomic_read(&cd->ignore_irq)) { + dev_vdbg(dev, "%s: Ignoring IRQ\n", __func__); + return IRQ_HANDLED; + } + + dev_dbg(dev, "%s int:0x%x\n", __func__, cd->int_status); + + mutex_lock(&cd->system_lock); + + /* Just to debug */ + if (cd->sleep_state == SS_SLEEP_ON || cd->sleep_state == SS_SLEEPING) + dev_vdbg(dev, "%s: Received IRQ while in sleep\n", __func__); + + rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), mode); + if (rc) { + dev_err(cd->dev, "%s: Fail read adapter r=%d\n", __func__, rc); + goto cyttsp4_irq_exit; + } + dev_vdbg(dev, "%s mode[0-2]:0x%X 0x%X 0x%X\n", __func__, + mode[0], mode[1], mode[2]); + + if (IS_BOOTLOADER(mode[0], mode[1])) { + cur_mode = CY_MODE_BOOTLOADER; + dev_vdbg(dev, "%s: bl running\n", __func__); + if (cd->mode == CY_MODE_BOOTLOADER) { + /* Signal bootloader heartbeat heard */ + wake_up(&cd->wait_q); + goto cyttsp4_irq_exit; + } + + /* switch to bootloader */ + dev_dbg(dev, "%s: restart switch to bl m=%d -> m=%d\n", + __func__, cd->mode, cur_mode); + + /* catch operation->bl glitch */ + if (cd->mode != CY_MODE_UNKNOWN) { + /* Incase startup_state do not let startup_() */ + cd->mode = CY_MODE_UNKNOWN; + cyttsp4_queue_startup_(cd); + goto cyttsp4_irq_exit; + } + + /* + * do not wake thread on this switch since + * it is possible to get an early heartbeat + * prior to performing the reset + */ + cd->mode = cur_mode; + + goto cyttsp4_irq_exit; + } + + switch (mode[0] & CY_HST_MODE) { + case CY_HST_OPERATE: + cur_mode = CY_MODE_OPERATIONAL; + dev_vdbg(dev, "%s: operational\n", __func__); + break; + case CY_HST_CAT: + cur_mode = CY_MODE_CAT; + dev_vdbg(dev, "%s: CaT\n", __func__); + break; + case CY_HST_SYSINFO: + cur_mode = CY_MODE_SYSINFO; + dev_vdbg(dev, "%s: sysinfo\n", __func__); + break; + default: + cur_mode = CY_MODE_UNKNOWN; + dev_err(dev, "%s: unknown HST mode 0x%02X\n", __func__, + mode[0]); + break; + } + + /* Check whether this IRQ should be ignored (internal) */ + if (cd->int_status & CY_INT_IGNORE) { + dev_vdbg(dev, "%s: Ignoring IRQ\n", __func__); + goto cyttsp4_irq_exit; + } + + /* Check for wake up interrupt */ + if (cd->int_status & CY_INT_AWAKE) { + cd->int_status &= ~CY_INT_AWAKE; + wake_up(&cd->wait_q); + dev_vdbg(dev, "%s: Received wake up interrupt\n", __func__); + goto cyttsp4_irq_handshake; + } + + /* Expecting mode change interrupt */ + if ((cd->int_status & CY_INT_MODE_CHANGE) + && (mode[0] & CY_HST_MODE_CHANGE) == 0) { + cd->int_status &= ~CY_INT_MODE_CHANGE; + dev_dbg(dev, "%s: finish mode switch m=%d -> m=%d\n", + __func__, cd->mode, cur_mode); + cd->mode = cur_mode; + wake_up(&cd->wait_q); + goto cyttsp4_irq_handshake; + } + + /* compare current core mode to current device mode */ + dev_vdbg(dev, "%s: cd->mode=%d cur_mode=%d\n", + __func__, cd->mode, cur_mode); + if ((mode[0] & CY_HST_MODE_CHANGE) == 0 && cd->mode != cur_mode) { + /* Unexpected mode change occurred */ + dev_err(dev, "%s %d->%d 0x%x\n", __func__, cd->mode, + cur_mode, cd->int_status); + dev_dbg(dev, "%s: Unexpected mode change, startup\n", + __func__); + cyttsp4_queue_startup_(cd); + goto cyttsp4_irq_exit; + } + + /* Expecting command complete interrupt */ + dev_vdbg(dev, "%s: command byte:0x%x\n", __func__, mode[cmd_ofs]); + if ((cd->int_status & CY_INT_EXEC_CMD) + && mode[cmd_ofs] & CY_CMD_COMPLETE) { + cd->int_status &= ~CY_INT_EXEC_CMD; + dev_vdbg(dev, "%s: Received command complete interrupt\n", + __func__); + wake_up(&cd->wait_q); + /* + * It is possible to receive a single interrupt for + * command complete and touch/button status report. + * Continue processing for a possible status report. + */ + } + + /* This should be status report, read status regs */ + if (cd->mode == CY_MODE_OPERATIONAL) { + dev_vdbg(dev, "%s: Read status registers\n", __func__); + rc = cyttsp4_load_status_regs(cd); + if (rc < 0) + dev_err(dev, "%s: fail read mode regs r=%d\n", + __func__, rc); + } + + cyttsp4_mt_attention(cd); + +cyttsp4_irq_handshake: + /* handshake the event */ + dev_vdbg(dev, "%s: Handshake mode=0x%02X r=%d\n", + __func__, mode[0], rc); + rc = cyttsp4_handshake(cd, mode[0]); + if (rc < 0) + dev_err(dev, "%s: Fail handshake mode=0x%02X r=%d\n", + __func__, mode[0], rc); + + /* + * a non-zero udelay period is required for using + * IRQF_TRIGGER_LOW in order to delay until the + * device completes isr deassert + */ + udelay(cd->cpdata->level_irq_udelay); + +cyttsp4_irq_exit: + mutex_unlock(&cd->system_lock); + return IRQ_HANDLED; +} + +static void cyttsp4_start_wd_timer(struct cyttsp4 *cd) +{ + if (!CY_WATCHDOG_TIMEOUT) + return; + + mod_timer(&cd->watchdog_timer, jiffies + + msecs_to_jiffies(CY_WATCHDOG_TIMEOUT)); +} + +static void cyttsp4_stop_wd_timer(struct cyttsp4 *cd) +{ + if (!CY_WATCHDOG_TIMEOUT) + return; + + /* + * Ensure we wait until the watchdog timer + * running on a different CPU finishes + */ + del_timer_sync(&cd->watchdog_timer); + cancel_work_sync(&cd->watchdog_work); + del_timer_sync(&cd->watchdog_timer); +} + +static void cyttsp4_watchdog_timer(struct timer_list *t) +{ + struct cyttsp4 *cd = from_timer(cd, t, watchdog_timer); + + dev_vdbg(cd->dev, "%s: Watchdog timer triggered\n", __func__); + + schedule_work(&cd->watchdog_work); + + return; +} + +static int cyttsp4_request_exclusive(struct cyttsp4 *cd, void *ownptr, + int timeout_ms) +{ + int t = msecs_to_jiffies(timeout_ms); + bool with_timeout = (timeout_ms != 0); + + mutex_lock(&cd->system_lock); + if (!cd->exclusive_dev && cd->exclusive_waits == 0) { + cd->exclusive_dev = ownptr; + goto exit; + } + + cd->exclusive_waits++; +wait: + mutex_unlock(&cd->system_lock); + if (with_timeout) { + t = wait_event_timeout(cd->wait_q, !cd->exclusive_dev, t); + if (IS_TMO(t)) { + dev_err(cd->dev, "%s: tmo waiting exclusive access\n", + __func__); + mutex_lock(&cd->system_lock); + cd->exclusive_waits--; + mutex_unlock(&cd->system_lock); + return -ETIME; + } + } else { + wait_event(cd->wait_q, !cd->exclusive_dev); + } + mutex_lock(&cd->system_lock); + if (cd->exclusive_dev) + goto wait; + cd->exclusive_dev = ownptr; + cd->exclusive_waits--; +exit: + mutex_unlock(&cd->system_lock); + + return 0; +} + +/* + * returns error if was not owned + */ +static int cyttsp4_release_exclusive(struct cyttsp4 *cd, void *ownptr) +{ + mutex_lock(&cd->system_lock); + if (cd->exclusive_dev != ownptr) { + mutex_unlock(&cd->system_lock); + return -EINVAL; + } + + dev_vdbg(cd->dev, "%s: exclusive_dev %p freed\n", + __func__, cd->exclusive_dev); + cd->exclusive_dev = NULL; + wake_up(&cd->wait_q); + mutex_unlock(&cd->system_lock); + return 0; +} + +static int cyttsp4_wait_bl_heartbeat(struct cyttsp4 *cd) +{ + long t; + int rc = 0; + + /* wait heartbeat */ + dev_vdbg(cd->dev, "%s: wait heartbeat...\n", __func__); + t = wait_event_timeout(cd->wait_q, cd->mode == CY_MODE_BOOTLOADER, + msecs_to_jiffies(CY_CORE_RESET_AND_WAIT_TIMEOUT)); + if (IS_TMO(t)) { + dev_err(cd->dev, "%s: tmo waiting bl heartbeat cd->mode=%d\n", + __func__, cd->mode); + rc = -ETIME; + } + + return rc; +} + +static int cyttsp4_wait_sysinfo_mode(struct cyttsp4 *cd) +{ + long t; + + dev_vdbg(cd->dev, "%s: wait sysinfo...\n", __func__); + + t = wait_event_timeout(cd->wait_q, cd->mode == CY_MODE_SYSINFO, + msecs_to_jiffies(CY_CORE_MODE_CHANGE_TIMEOUT)); + if (IS_TMO(t)) { + dev_err(cd->dev, "%s: tmo waiting exit bl cd->mode=%d\n", + __func__, cd->mode); + mutex_lock(&cd->system_lock); + cd->int_status &= ~CY_INT_MODE_CHANGE; + mutex_unlock(&cd->system_lock); + return -ETIME; + } + + return 0; +} + +static int cyttsp4_reset_and_wait(struct cyttsp4 *cd) +{ + int rc; + + /* reset hardware */ + mutex_lock(&cd->system_lock); + dev_dbg(cd->dev, "%s: reset hw...\n", __func__); + rc = cyttsp4_hw_reset(cd); + cd->mode = CY_MODE_UNKNOWN; + mutex_unlock(&cd->system_lock); + if (rc < 0) { + dev_err(cd->dev, "%s:Fail hw reset r=%d\n", __func__, rc); + return rc; + } + + return cyttsp4_wait_bl_heartbeat(cd); +} + +/* + * returns err if refused or timeout; block until mode change complete + * bit is set (mode change interrupt) + */ +static int cyttsp4_set_mode(struct cyttsp4 *cd, int new_mode) +{ + u8 new_dev_mode; + u8 mode; + long t; + int rc; + + switch (new_mode) { + case CY_MODE_OPERATIONAL: + new_dev_mode = CY_HST_OPERATE; + break; + case CY_MODE_SYSINFO: + new_dev_mode = CY_HST_SYSINFO; + break; + case CY_MODE_CAT: + new_dev_mode = CY_HST_CAT; + break; + default: + dev_err(cd->dev, "%s: invalid mode: %02X(%d)\n", + __func__, new_mode, new_mode); + return -EINVAL; + } + + /* change mode */ + dev_dbg(cd->dev, "%s: %s=%p new_dev_mode=%02X new_mode=%d\n", + __func__, "have exclusive", cd->exclusive_dev, + new_dev_mode, new_mode); + + mutex_lock(&cd->system_lock); + rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode); + if (rc < 0) { + mutex_unlock(&cd->system_lock); + dev_err(cd->dev, "%s: Fail read mode r=%d\n", + __func__, rc); + goto exit; + } + + /* Clear device mode bits and set to new mode */ + mode &= ~CY_HST_MODE; + mode |= new_dev_mode | CY_HST_MODE_CHANGE; + + cd->int_status |= CY_INT_MODE_CHANGE; + rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(mode), &mode); + mutex_unlock(&cd->system_lock); + if (rc < 0) { + dev_err(cd->dev, "%s: Fail write mode change r=%d\n", + __func__, rc); + goto exit; + } + + /* wait for mode change done interrupt */ + t = wait_event_timeout(cd->wait_q, + (cd->int_status & CY_INT_MODE_CHANGE) == 0, + msecs_to_jiffies(CY_CORE_MODE_CHANGE_TIMEOUT)); + dev_dbg(cd->dev, "%s: back from wait t=%ld cd->mode=%d\n", + __func__, t, cd->mode); + + if (IS_TMO(t)) { + dev_err(cd->dev, "%s: %s\n", __func__, + "tmo waiting mode change"); + mutex_lock(&cd->system_lock); + cd->int_status &= ~CY_INT_MODE_CHANGE; + mutex_unlock(&cd->system_lock); + rc = -EINVAL; + } + +exit: + return rc; +} + +static void cyttsp4_watchdog_work(struct work_struct *work) +{ + struct cyttsp4 *cd = + container_of(work, struct cyttsp4, watchdog_work); + u8 *mode; + int retval; + + mutex_lock(&cd->system_lock); + retval = cyttsp4_load_status_regs(cd); + if (retval < 0) { + dev_err(cd->dev, + "%s: failed to access device in watchdog timer r=%d\n", + __func__, retval); + cyttsp4_queue_startup_(cd); + goto cyttsp4_timer_watchdog_exit_error; + } + mode = &cd->sysinfo.xy_mode[CY_REG_BASE]; + if (IS_BOOTLOADER(mode[0], mode[1])) { + dev_err(cd->dev, + "%s: device found in bootloader mode when operational mode\n", + __func__); + cyttsp4_queue_startup_(cd); + goto cyttsp4_timer_watchdog_exit_error; + } + + cyttsp4_start_wd_timer(cd); +cyttsp4_timer_watchdog_exit_error: + mutex_unlock(&cd->system_lock); + return; +} + +static int cyttsp4_core_sleep_(struct cyttsp4 *cd) +{ + enum cyttsp4_sleep_state ss = SS_SLEEP_ON; + enum cyttsp4_int_state int_status = CY_INT_IGNORE; + int rc = 0; + u8 mode[2]; + + /* Already in sleep mode? */ + mutex_lock(&cd->system_lock); + if (cd->sleep_state == SS_SLEEP_ON) { + mutex_unlock(&cd->system_lock); + return 0; + } + cd->sleep_state = SS_SLEEPING; + mutex_unlock(&cd->system_lock); + + cyttsp4_stop_wd_timer(cd); + + /* Wait until currently running IRQ handler exits and disable IRQ */ + disable_irq(cd->irq); + + dev_vdbg(cd->dev, "%s: write DEEP SLEEP...\n", __func__); + mutex_lock(&cd->system_lock); + rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode); + if (rc) { + mutex_unlock(&cd->system_lock); + dev_err(cd->dev, "%s: Fail read adapter r=%d\n", __func__, rc); + goto error; + } + + if (IS_BOOTLOADER(mode[0], mode[1])) { + mutex_unlock(&cd->system_lock); + dev_err(cd->dev, "%s: Device in BOOTLOADER mode.\n", __func__); + rc = -EINVAL; + goto error; + } + + mode[0] |= CY_HST_SLEEP; + rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(mode[0]), &mode[0]); + mutex_unlock(&cd->system_lock); + if (rc) { + dev_err(cd->dev, "%s: Fail write adapter r=%d\n", __func__, rc); + goto error; + } + dev_vdbg(cd->dev, "%s: write DEEP SLEEP succeeded\n", __func__); + + if (cd->cpdata->power) { + dev_dbg(cd->dev, "%s: Power down HW\n", __func__); + rc = cd->cpdata->power(cd->cpdata, 0, cd->dev, &cd->ignore_irq); + } else { + dev_dbg(cd->dev, "%s: No power function\n", __func__); + rc = 0; + } + if (rc < 0) { + dev_err(cd->dev, "%s: HW Power down fails r=%d\n", + __func__, rc); + goto error; + } + + /* Give time to FW to sleep */ + msleep(50); + + goto exit; + +error: + ss = SS_SLEEP_OFF; + int_status = CY_INT_NONE; + cyttsp4_start_wd_timer(cd); + +exit: + mutex_lock(&cd->system_lock); + cd->sleep_state = ss; + cd->int_status |= int_status; + mutex_unlock(&cd->system_lock); + enable_irq(cd->irq); + return rc; +} + +static int cyttsp4_startup_(struct cyttsp4 *cd) +{ + int retry = CY_CORE_STARTUP_RETRY_COUNT; + int rc; + + cyttsp4_stop_wd_timer(cd); + +reset: + if (retry != CY_CORE_STARTUP_RETRY_COUNT) + dev_dbg(cd->dev, "%s: Retry %d\n", __func__, + CY_CORE_STARTUP_RETRY_COUNT - retry); + + /* reset hardware and wait for heartbeat */ + rc = cyttsp4_reset_and_wait(cd); + if (rc < 0) { + dev_err(cd->dev, "%s: Error on h/w reset r=%d\n", __func__, rc); + if (retry--) + goto reset; + goto exit; + } + + /* exit bl into sysinfo mode */ + dev_vdbg(cd->dev, "%s: write exit ldr...\n", __func__); + mutex_lock(&cd->system_lock); + cd->int_status &= ~CY_INT_IGNORE; + cd->int_status |= CY_INT_MODE_CHANGE; + + rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(ldr_exit), + (u8 *)ldr_exit); + mutex_unlock(&cd->system_lock); + if (rc < 0) { + dev_err(cd->dev, "%s: Fail write r=%d\n", __func__, rc); + if (retry--) + goto reset; + goto exit; + } + + rc = cyttsp4_wait_sysinfo_mode(cd); + if (rc < 0) { + u8 buf[sizeof(ldr_err_app)]; + int rc1; + + /* Check for invalid/corrupted touch application */ + rc1 = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(ldr_err_app), + buf); + if (rc1) { + dev_err(cd->dev, "%s: Fail read r=%d\n", __func__, rc1); + } else if (!memcmp(buf, ldr_err_app, sizeof(ldr_err_app))) { + dev_err(cd->dev, "%s: Error launching touch application\n", + __func__); + mutex_lock(&cd->system_lock); + cd->invalid_touch_app = true; + mutex_unlock(&cd->system_lock); + goto exit_no_wd; + } + + if (retry--) + goto reset; + goto exit; + } + + mutex_lock(&cd->system_lock); + cd->invalid_touch_app = false; + mutex_unlock(&cd->system_lock); + + /* read sysinfo data */ + dev_vdbg(cd->dev, "%s: get sysinfo regs..\n", __func__); + rc = cyttsp4_get_sysinfo_regs(cd); + if (rc < 0) { + dev_err(cd->dev, "%s: failed to get sysinfo regs rc=%d\n", + __func__, rc); + if (retry--) + goto reset; + goto exit; + } + + rc = cyttsp4_set_mode(cd, CY_MODE_OPERATIONAL); + if (rc < 0) { + dev_err(cd->dev, "%s: failed to set mode to operational rc=%d\n", + __func__, rc); + if (retry--) + goto reset; + goto exit; + } + + cyttsp4_lift_all(&cd->md); + + /* restore to sleep if was suspended */ + mutex_lock(&cd->system_lock); + if (cd->sleep_state == SS_SLEEP_ON) { + cd->sleep_state = SS_SLEEP_OFF; + mutex_unlock(&cd->system_lock); + cyttsp4_core_sleep_(cd); + goto exit_no_wd; + } + mutex_unlock(&cd->system_lock); + +exit: + cyttsp4_start_wd_timer(cd); +exit_no_wd: + return rc; +} + +static int cyttsp4_startup(struct cyttsp4 *cd) +{ + int rc; + + mutex_lock(&cd->system_lock); + cd->startup_state = STARTUP_RUNNING; + mutex_unlock(&cd->system_lock); + + rc = cyttsp4_request_exclusive(cd, cd->dev, + CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT); + if (rc < 0) { + dev_err(cd->dev, "%s: fail get exclusive ex=%p own=%p\n", + __func__, cd->exclusive_dev, cd->dev); + goto exit; + } + + rc = cyttsp4_startup_(cd); + + if (cyttsp4_release_exclusive(cd, cd->dev) < 0) + /* Don't return fail code, mode is already changed. */ + dev_err(cd->dev, "%s: fail to release exclusive\n", __func__); + else + dev_vdbg(cd->dev, "%s: pass release exclusive\n", __func__); + +exit: + mutex_lock(&cd->system_lock); + cd->startup_state = STARTUP_NONE; + mutex_unlock(&cd->system_lock); + + /* Wake the waiters for end of startup */ + wake_up(&cd->wait_q); + + return rc; +} + +static void cyttsp4_startup_work_function(struct work_struct *work) +{ + struct cyttsp4 *cd = container_of(work, struct cyttsp4, startup_work); + int rc; + + rc = cyttsp4_startup(cd); + if (rc < 0) + dev_err(cd->dev, "%s: Fail queued startup r=%d\n", + __func__, rc); +} + +static void cyttsp4_free_si_ptrs(struct cyttsp4 *cd) +{ + struct cyttsp4_sysinfo *si = &cd->sysinfo; + + if (!si) + return; + + kfree(si->si_ptrs.cydata); + kfree(si->si_ptrs.test); + kfree(si->si_ptrs.pcfg); + kfree(si->si_ptrs.opcfg); + kfree(si->si_ptrs.ddata); + kfree(si->si_ptrs.mdata); + kfree(si->btn); + kfree(si->xy_mode); + kfree(si->xy_data); + kfree(si->btn_rec_data); +} + +#ifdef CONFIG_PM +static int cyttsp4_core_sleep(struct cyttsp4 *cd) +{ + int rc; + + rc = cyttsp4_request_exclusive(cd, cd->dev, + CY_CORE_SLEEP_REQUEST_EXCLUSIVE_TIMEOUT); + if (rc < 0) { + dev_err(cd->dev, "%s: fail get exclusive ex=%p own=%p\n", + __func__, cd->exclusive_dev, cd->dev); + return 0; + } + + rc = cyttsp4_core_sleep_(cd); + + if (cyttsp4_release_exclusive(cd, cd->dev) < 0) + dev_err(cd->dev, "%s: fail to release exclusive\n", __func__); + else + dev_vdbg(cd->dev, "%s: pass release exclusive\n", __func__); + + return rc; +} + +static int cyttsp4_core_wake_(struct cyttsp4 *cd) +{ + struct device *dev = cd->dev; + int rc; + u8 mode; + int t; + + /* Already woken? */ + mutex_lock(&cd->system_lock); + if (cd->sleep_state == SS_SLEEP_OFF) { + mutex_unlock(&cd->system_lock); + return 0; + } + cd->int_status &= ~CY_INT_IGNORE; + cd->int_status |= CY_INT_AWAKE; + cd->sleep_state = SS_WAKING; + + if (cd->cpdata->power) { + dev_dbg(dev, "%s: Power up HW\n", __func__); + rc = cd->cpdata->power(cd->cpdata, 1, dev, &cd->ignore_irq); + } else { + dev_dbg(dev, "%s: No power function\n", __func__); + rc = -ENOSYS; + } + if (rc < 0) { + dev_err(dev, "%s: HW Power up fails r=%d\n", + __func__, rc); + + /* Initiate a read transaction to wake up */ + cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(mode), &mode); + } else + dev_vdbg(cd->dev, "%s: HW power up succeeds\n", + __func__); + mutex_unlock(&cd->system_lock); + + t = wait_event_timeout(cd->wait_q, + (cd->int_status & CY_INT_AWAKE) == 0, + msecs_to_jiffies(CY_CORE_WAKEUP_TIMEOUT)); + if (IS_TMO(t)) { + dev_err(dev, "%s: TMO waiting for wakeup\n", __func__); + mutex_lock(&cd->system_lock); + cd->int_status &= ~CY_INT_AWAKE; + /* Try starting up */ + cyttsp4_queue_startup_(cd); + mutex_unlock(&cd->system_lock); + } + + mutex_lock(&cd->system_lock); + cd->sleep_state = SS_SLEEP_OFF; + mutex_unlock(&cd->system_lock); + + cyttsp4_start_wd_timer(cd); + + return 0; +} + +static int cyttsp4_core_wake(struct cyttsp4 *cd) +{ + int rc; + + rc = cyttsp4_request_exclusive(cd, cd->dev, + CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT); + if (rc < 0) { + dev_err(cd->dev, "%s: fail get exclusive ex=%p own=%p\n", + __func__, cd->exclusive_dev, cd->dev); + return 0; + } + + rc = cyttsp4_core_wake_(cd); + + if (cyttsp4_release_exclusive(cd, cd->dev) < 0) + dev_err(cd->dev, "%s: fail to release exclusive\n", __func__); + else + dev_vdbg(cd->dev, "%s: pass release exclusive\n", __func__); + + return rc; +} + +static int cyttsp4_core_suspend(struct device *dev) +{ + struct cyttsp4 *cd = dev_get_drvdata(dev); + struct cyttsp4_mt_data *md = &cd->md; + int rc; + + md->is_suspended = true; + + rc = cyttsp4_core_sleep(cd); + if (rc < 0) { + dev_err(dev, "%s: Error on sleep\n", __func__); + return -EAGAIN; + } + return 0; +} + +static int cyttsp4_core_resume(struct device *dev) +{ + struct cyttsp4 *cd = dev_get_drvdata(dev); + struct cyttsp4_mt_data *md = &cd->md; + int rc; + + md->is_suspended = false; + + rc = cyttsp4_core_wake(cd); + if (rc < 0) { + dev_err(dev, "%s: Error on wake\n", __func__); + return -EAGAIN; + } + + return 0; +} +#endif + +const struct dev_pm_ops cyttsp4_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(cyttsp4_core_suspend, cyttsp4_core_resume) + SET_RUNTIME_PM_OPS(cyttsp4_core_suspend, cyttsp4_core_resume, NULL) +}; +EXPORT_SYMBOL_GPL(cyttsp4_pm_ops); + +static int cyttsp4_mt_open(struct input_dev *input) +{ + pm_runtime_get(input->dev.parent); + return 0; +} + +static void cyttsp4_mt_close(struct input_dev *input) +{ + struct cyttsp4_mt_data *md = input_get_drvdata(input); + mutex_lock(&md->report_lock); + if (!md->is_suspended) + pm_runtime_put(input->dev.parent); + mutex_unlock(&md->report_lock); +} + + +static int cyttsp4_setup_input_device(struct cyttsp4 *cd) +{ + struct device *dev = cd->dev; + struct cyttsp4_mt_data *md = &cd->md; + int signal = CY_IGNORE_VALUE; + int max_x, max_y, max_p, min, max; + int max_x_tmp, max_y_tmp; + int i; + int rc; + + dev_vdbg(dev, "%s: Initialize event signals\n", __func__); + __set_bit(EV_ABS, md->input->evbit); + __set_bit(EV_REL, md->input->evbit); + __set_bit(EV_KEY, md->input->evbit); + + max_x_tmp = md->si->si_ofs.max_x; + max_y_tmp = md->si->si_ofs.max_y; + + /* get maximum values from the sysinfo data */ + if (md->pdata->flags & CY_FLAG_FLIP) { + max_x = max_y_tmp - 1; + max_y = max_x_tmp - 1; + } else { + max_x = max_x_tmp - 1; + max_y = max_y_tmp - 1; + } + max_p = md->si->si_ofs.max_p; + + /* set event signal capabilities */ + for (i = 0; i < (md->pdata->frmwrk->size / CY_NUM_ABS_SET); i++) { + signal = md->pdata->frmwrk->abs + [(i * CY_NUM_ABS_SET) + CY_SIGNAL_OST]; + if (signal != CY_IGNORE_VALUE) { + __set_bit(signal, md->input->absbit); + min = md->pdata->frmwrk->abs + [(i * CY_NUM_ABS_SET) + CY_MIN_OST]; + max = md->pdata->frmwrk->abs + [(i * CY_NUM_ABS_SET) + CY_MAX_OST]; + if (i == CY_ABS_ID_OST) { + /* shift track ids down to start at 0 */ + max = max - min; + min = min - min; + } else if (i == CY_ABS_X_OST) + max = max_x; + else if (i == CY_ABS_Y_OST) + max = max_y; + else if (i == CY_ABS_P_OST) + max = max_p; + input_set_abs_params(md->input, signal, min, max, + md->pdata->frmwrk->abs + [(i * CY_NUM_ABS_SET) + CY_FUZZ_OST], + md->pdata->frmwrk->abs + [(i * CY_NUM_ABS_SET) + CY_FLAT_OST]); + dev_dbg(dev, "%s: register signal=%02X min=%d max=%d\n", + __func__, signal, min, max); + if ((i == CY_ABS_ID_OST) && + (md->si->si_ofs.tch_rec_size < + CY_TMA4XX_TCH_REC_SIZE)) + break; + } + } + + input_mt_init_slots(md->input, md->si->si_ofs.tch_abs[CY_TCH_T].max, + INPUT_MT_DIRECT); + rc = input_register_device(md->input); + if (rc < 0) + dev_err(dev, "%s: Error, failed register input device r=%d\n", + __func__, rc); + return rc; +} + +static int cyttsp4_mt_probe(struct cyttsp4 *cd) +{ + struct device *dev = cd->dev; + struct cyttsp4_mt_data *md = &cd->md; + struct cyttsp4_mt_platform_data *pdata = cd->pdata->mt_pdata; + int rc = 0; + + mutex_init(&md->report_lock); + md->pdata = pdata; + /* Create the input device and register it. */ + dev_vdbg(dev, "%s: Create the input device and register it\n", + __func__); + md->input = input_allocate_device(); + if (md->input == NULL) { + dev_err(dev, "%s: Error, failed to allocate input device\n", + __func__); + rc = -ENOSYS; + goto error_alloc_failed; + } + + md->input->name = pdata->inp_dev_name; + scnprintf(md->phys, sizeof(md->phys)-1, "%s", dev_name(dev)); + md->input->phys = md->phys; + md->input->id.bustype = cd->bus_ops->bustype; + md->input->dev.parent = dev; + md->input->open = cyttsp4_mt_open; + md->input->close = cyttsp4_mt_close; + input_set_drvdata(md->input, md); + + /* get sysinfo */ + md->si = &cd->sysinfo; + + rc = cyttsp4_setup_input_device(cd); + if (rc) + goto error_init_input; + + return 0; + +error_init_input: + input_free_device(md->input); +error_alloc_failed: + dev_err(dev, "%s failed.\n", __func__); + return rc; +} + +struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops, + struct device *dev, u16 irq, size_t xfer_buf_size) +{ + struct cyttsp4 *cd; + struct cyttsp4_platform_data *pdata = dev_get_platdata(dev); + unsigned long irq_flags; + int rc = 0; + + if (!pdata || !pdata->core_pdata || !pdata->mt_pdata) { + dev_err(dev, "%s: Missing platform data\n", __func__); + rc = -ENODEV; + goto error_no_pdata; + } + + cd = kzalloc(sizeof(*cd), GFP_KERNEL); + if (!cd) { + dev_err(dev, "%s: Error, kzalloc\n", __func__); + rc = -ENOMEM; + goto error_alloc_data; + } + + cd->xfer_buf = kzalloc(xfer_buf_size, GFP_KERNEL); + if (!cd->xfer_buf) { + dev_err(dev, "%s: Error, kzalloc\n", __func__); + rc = -ENOMEM; + goto error_free_cd; + } + + /* Initialize device info */ + cd->dev = dev; + cd->pdata = pdata; + cd->cpdata = pdata->core_pdata; + cd->bus_ops = ops; + + /* Initialize mutexes and spinlocks */ + mutex_init(&cd->system_lock); + mutex_init(&cd->adap_lock); + + /* Initialize wait queue */ + init_waitqueue_head(&cd->wait_q); + + /* Initialize works */ + INIT_WORK(&cd->startup_work, cyttsp4_startup_work_function); + INIT_WORK(&cd->watchdog_work, cyttsp4_watchdog_work); + + /* Initialize IRQ */ + cd->irq = gpio_to_irq(cd->cpdata->irq_gpio); + if (cd->irq < 0) { + rc = -EINVAL; + goto error_free_xfer; + } + + dev_set_drvdata(dev, cd); + + /* Call platform init function */ + if (cd->cpdata->init) { + dev_dbg(cd->dev, "%s: Init HW\n", __func__); + rc = cd->cpdata->init(cd->cpdata, 1, cd->dev); + } else { + dev_dbg(cd->dev, "%s: No HW INIT function\n", __func__); + rc = 0; + } + if (rc < 0) + dev_err(cd->dev, "%s: HW Init fail r=%d\n", __func__, rc); + + dev_dbg(dev, "%s: initialize threaded irq=%d\n", __func__, cd->irq); + if (cd->cpdata->level_irq_udelay > 0) + /* use level triggered interrupts */ + irq_flags = IRQF_TRIGGER_LOW | IRQF_ONESHOT; + else + /* use edge triggered interrupts */ + irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT; + + rc = request_threaded_irq(cd->irq, NULL, cyttsp4_irq, irq_flags, + dev_name(dev), cd); + if (rc < 0) { + dev_err(dev, "%s: Error, could not request irq\n", __func__); + goto error_request_irq; + } + + /* Setup watchdog timer */ + timer_setup(&cd->watchdog_timer, cyttsp4_watchdog_timer, 0); + + /* + * call startup directly to ensure that the device + * is tested before leaving the probe + */ + rc = cyttsp4_startup(cd); + + /* Do not fail probe if startup fails but the device is detected */ + if (rc < 0 && cd->mode == CY_MODE_UNKNOWN) { + dev_err(cd->dev, "%s: Fail initial startup r=%d\n", + __func__, rc); + goto error_startup; + } + + rc = cyttsp4_mt_probe(cd); + if (rc < 0) { + dev_err(dev, "%s: Error, fail mt probe\n", __func__); + goto error_startup; + } + + pm_runtime_enable(dev); + + return cd; + +error_startup: + cancel_work_sync(&cd->startup_work); + cyttsp4_stop_wd_timer(cd); + pm_runtime_disable(dev); + cyttsp4_free_si_ptrs(cd); + free_irq(cd->irq, cd); +error_request_irq: + if (cd->cpdata->init) + cd->cpdata->init(cd->cpdata, 0, dev); +error_free_xfer: + kfree(cd->xfer_buf); +error_free_cd: + kfree(cd); +error_alloc_data: +error_no_pdata: + dev_err(dev, "%s failed.\n", __func__); + return ERR_PTR(rc); +} +EXPORT_SYMBOL_GPL(cyttsp4_probe); + +static void cyttsp4_mt_release(struct cyttsp4_mt_data *md) +{ + input_unregister_device(md->input); + input_set_drvdata(md->input, NULL); +} + +int cyttsp4_remove(struct cyttsp4 *cd) +{ + struct device *dev = cd->dev; + + cyttsp4_mt_release(&cd->md); + + /* + * Suspend the device before freeing the startup_work and stopping + * the watchdog since sleep function restarts watchdog on failure + */ + pm_runtime_suspend(dev); + pm_runtime_disable(dev); + + cancel_work_sync(&cd->startup_work); + + cyttsp4_stop_wd_timer(cd); + + free_irq(cd->irq, cd); + if (cd->cpdata->init) + cd->cpdata->init(cd->cpdata, 0, dev); + cyttsp4_free_si_ptrs(cd); + kfree(cd); + return 0; +} +EXPORT_SYMBOL_GPL(cyttsp4_remove); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen core driver"); +MODULE_AUTHOR("Cypress"); |