From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-x242.google.com (mail-oi0-x242.google.com [IPv6:2607:f8b0:4003:c06::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3srtt527JnzDrWh for ; Sun, 9 Oct 2016 04:39:09 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=K6pXXf8Z; dkim-atps=neutral Received: by mail-oi0-x242.google.com with SMTP id i127so3748904oia.0 for ; Sat, 08 Oct 2016 10:39:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=5/l9GSguLmdsNaTyjE0TJqyq8mDG562gCo7EDwgmE4E=; b=K6pXXf8ZQA8qu6xVTHaYvlbMoM7p9DlaGObUffcA/jwVIas2D1lZ0pEKgdzXLChyHG ILzg9xO8G0LXMs5mBxDSrNHTPjsAOhzjEDeEqd7C5MSCo9qilOXZ/Y64BWqBbOZWavw5 Mmg4ipcAjC0aC8IYh6k1MJtagOHKEa1ho9zhqt1UUIu6qfGfYD7Gm92AXIPUN4i2GlLe NgZCjzmCF0NYMh/8SUEM9zLWj0YVEJKhNa+nUDpqb+hZHNtMR3nmPmeguYgWC8eN9N3O 8AZY1LFg3kvKVU2r0xWoGzA8e4/jh6zVtT9BvXplVfczYm9qbnhJTDGRmLFWvewbZ6C1 OFwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=5/l9GSguLmdsNaTyjE0TJqyq8mDG562gCo7EDwgmE4E=; b=cOd9B1cCQB0/TXlF2kP25iIYVoiOo5Tgp2BgLQsQsCUFOfO4HbTxVRlUcG/t1rkpv/ LOtsupz/mjWHUn5fNO3QTAD9EOSeAAWw6Cuduy+Q3baKT0ooz741O+o1Hk8aOpjNZOOi vmxNTUQS5/G172zD8ClqbZVsY/qhrC4cB0q0jYwfmws5E/MkuNIaZAKz7oQSqs17M3PG Ep1DF2fFEXh3GqNrn7Z01QVwc60dteDbk4mgKyvIJFfSdl+l5Dld2p80Ue7SlHs6rQ8T M1KQ4HDGNbm1q4c2jH8hbUBjmabCd83vSE1zBqpBlEIOsfVUSbHQdtsyL3jWklRvmFBm 9PIA== X-Gm-Message-State: AA6/9Rn0Pp5zrr0wJFDYXYb8xnigjQLypY9bJbSYgmAKwmxXxqE8eHbbxfONj+3ISND5YA== X-Received: by 10.157.15.97 with SMTP id 88mr13732399ott.239.1475948347517; Sat, 08 Oct 2016 10:39:07 -0700 (PDT) Received: from Christophers-MacBook-Pro.local.com (45-20-192-79.lightspeed.austtx.sbcglobal.net. [45.20.192.79]) by smtp.gmail.com with ESMTPSA id g17sm8025290otd.38.2016.10.08.10.39.06 (version=TLS1 cipher=AES128-SHA bits=128/128); Sat, 08 Oct 2016 10:39:07 -0700 (PDT) From: christopher.lee.bostic@gmail.com To: openbmc@lists.ozlabs.org Cc: joel@jms.id.au, zahrens@us.ibm.com, xxpetri@de.ibm.com, Jeremy Kerr Subject: [PATCH linux v2 11/17] fsi: scan slaves & register devices Date: Sat, 8 Oct 2016 12:38:47 -0500 Message-Id: <1475948333-55960-12-git-send-email-christopher.lee.bostic@gmail.com> X-Mailer: git-send-email 2.7.4 (Apple Git-66) In-Reply-To: <1475948333-55960-1-git-send-email-christopher.lee.bostic@gmail.com> References: <1475948333-55960-1-git-send-email-christopher.lee.bostic@gmail.com> X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 Oct 2016 17:39:10 -0000 From: Jeremy Kerr Now that we have fsi_slave devices, scan each for endpoints, and register them on the fsi bus. Signed-off-by: Jeremy Kerr --- drivers/fsi/fsi-core.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++++- include/linux/fsi.h | 4 ++ 2 files changed, 128 insertions(+), 1 deletion(-) diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index 49a8e14..63d26b5 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -24,6 +24,16 @@ #define FSI_N_SLAVES 4 +#define FSI_SLAVE_CONF_NEXT_MASK 0x80000000 +#define FSI_SLAVE_CONF_SLOTS_MASK 0x00ff0000 +#define FSI_SLAVE_CONF_SLOTS_SHIFT 16 +#define FSI_SLAVE_CONF_VERSION_MASK 0x0000f000 +#define FSI_SLAVE_CONF_VERSION_SHIFT 12 +#define FSI_SLAVE_CONF_TYPE_MASK 0x00000ff0 +#define FSI_SLAVE_CONF_TYPE_SHIFT 4 + +static const int engine_page_size = 0x400; + static atomic_t master_idx = ATOMIC_INIT(-1); struct fsi_slave { @@ -35,6 +45,29 @@ struct fsi_slave { #define to_fsi_slave(d) container_of(d, struct fsi_slave, dev) +/* FSI endpoint-device support */ + +static void fsi_device_release(struct device *_device) +{ + struct fsi_device *device = to_fsi_dev(_device); + kfree(device); +} + +static struct fsi_device *fsi_create_device(struct fsi_slave *slave) +{ + struct fsi_device *dev; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return NULL; + + dev->dev.parent = &slave->dev; + dev->dev.bus = &fsi_bus_type; + dev->dev.release = fsi_device_release; + + return dev; +} + /* crc helpers */ static const uint8_t crc4_tab[] = { 0x0, 0x7, 0xe, 0x9, 0xb, 0xc, 0x5, 0x2, @@ -59,6 +92,95 @@ static bool check_crc4(uint32_t x) } /* FSI slave support */ +static int fsi_slave_read(struct fsi_slave *slave, uint32_t addr, + void *val, size_t size) +{ + return slave->master->read(slave->master, slave->link, + slave->id, addr, val, size); +} + +static int fsi_slave_scan(struct fsi_slave *slave) +{ + uint32_t engine_addr; + uint32_t conf; + int rc, i; + + /* + * scan engines + * + * We keep the peek mode and slave engines for the core; so start + * at the third slot in the configuration table. We also need to + * skip the chip ID entry at the start of the address space. + */ + engine_addr = engine_page_size * 3; + for (i = 2; i < engine_page_size / sizeof(uint32_t); i++) { + uint8_t slots, version, type; + struct fsi_device *dev; + + rc = fsi_slave_read(slave, (i + 1) * sizeof(conf), + &conf, sizeof(conf)); + if (rc) { + dev_warn(&slave->dev, + "error reading slave registers\n"); + return -1; + } + + conf = be32_to_cpu(conf); + + if (!check_crc4(conf)) { + dev_warn(&slave->dev, + "crc error in slave register at 0x%04x\n", + i); + return -1; + } + + slots = (conf & FSI_SLAVE_CONF_SLOTS_MASK) + >> FSI_SLAVE_CONF_SLOTS_SHIFT; + version = (conf & FSI_SLAVE_CONF_VERSION_MASK) + >> FSI_SLAVE_CONF_VERSION_SHIFT; + type = (conf & FSI_SLAVE_CONF_TYPE_MASK) + >> FSI_SLAVE_CONF_TYPE_SHIFT; + + /* Unused address areas are marked by a zero type value; this + * skips the defined address areas */ + if (type != 0) { + + /* create device */ + dev = fsi_create_device(slave); + if (!dev) + return -ENOMEM; + + dev->engine_type = type; + dev->version = version; + dev->unit = i; + dev->addr = engine_addr; + dev->size = slots * engine_page_size; + + dev_info(&slave->dev, + "engine[%i]: type %x, version %x, addr %x size %x\n", + dev->unit, dev->engine_type, version, + dev->addr, dev->size); + + device_initialize(&dev->dev); + dev_set_name(&dev->dev, "%02x:%02x:%02x:%02x", + slave->master->idx, slave->link, + slave->id, i - 2); + + rc = device_add(&dev->dev); + if (rc) { + dev_warn(&slave->dev, "add failed: %d\n", rc); + put_device(&dev->dev); + } + } + + engine_addr += slots * engine_page_size; + + if (!(conf & FSI_SLAVE_CONF_NEXT_MASK)) + break; + } + + return 0; +} static void fsi_slave_release(struct device *dev) { @@ -109,7 +231,8 @@ static int fsi_slave_init(struct fsi_master *master, return rc; } - return rc; + fsi_slave_scan(slave); + return 0; } /* FSI master support */ diff --git a/include/linux/fsi.h b/include/linux/fsi.h index 6d843d4..dfd3513 100644 --- a/include/linux/fsi.h +++ b/include/linux/fsi.h @@ -22,6 +22,10 @@ struct fsi_device { struct device dev; u8 engine_type; u8 version; + u8 unit; + struct fsi_slave *slave; + uint32_t addr; + uint32_t size; }; struct fsi_device_id { -- 1.8.2.2