You certainly have a good workers' comp case. You should ask the boss or H.R. for a workers' comp claim form. Or you can get one at www.dir.ca.gov. Fill it out and turn it in to the employer. This should get you started on the road to W.C. benefits.
You probably cannot sue your employer for an on the job injury. Was the tile unstable because of some work being done? Was there a third party (not you or your employer) responsible for the fall? If not, then there's probably no personal injury case there.
You may want to get a free consult with a good workers' comp attorney. There are some great ones in the Inland Empire. Find a good one here at www.avvo.com or at www.caaa.org. CAAA is the association here in California for attorneys who represent injured workers. Or you can call me for a referral. Good luck.
For the injury itself you cannot sue, but I do believe you sue if he laid you off because of the injury. It is discrimination if he laid you off because of the injury. You should speak with a workers' compensation attorney.
This is not legal advise and my opinion is not intended and does not create an attorney client relationship. Use this information at your own risk.
While I cannot give you legal advice in this forum, I would suggest you contact a good workers compensation attorney. A good workers compensation attorney should be able to handle all of these issues for you. I believe this scenario happens quite often.